They saw two rainbows arcing over a body of water.    From LearnThat.org. 

Without warning, he struck at Kory, the sword arcing down towards him.    From Wordnik.com.  [Knight Of Ghosts And Shadows]

He sent fireballs arcing up the corridor in response.    From Wordnik.com.  [Odyssey]

Then we made a hard, arcing left turn off the runway.    From Wordnik.com.  ['A Sudden, Terrible Stillness'] Reference

The current continues flowing via the arcing contact (2).    From Wordnik.com.  [2. Important components of switches] Reference

There were fiery boulders too, arcing down to fall all around them.    From Wordnik.com.  [Harpy Thyme]

As Newman hovered, he saw orange tracers arcing up from the dark trees.    From Wordnik.com.  [Saigon Quartet] Reference

The cave was a curious formation, its arcing walls scalloped and winding.    From Wordnik.com.  [The Woods Out Back]

Obviously, arcing wires along with flammable fuel is not a good combination.    From Wordnik.com.  [CNN Transcript Mar 27, 2008] Reference

They consist of electrically conductive arcing horn rings with short electrodes.    From Wordnik.com.  [8. Protective, control and supervisory systems as important additional equipment for power installations] Reference

And I-- if I remember correctly, the flight over Long Island Sound, that arcing.    From Wordnik.com.  [CNN Transcript Mar 27, 2008] Reference

A second arrow came down from on high, arcing into the courtyard behind the gate itself.    From Wordnik.com.  [Immortalis]

And most of those have been transformers, you know, a lot of arcing and not really fires.    From Wordnik.com.  [CNN Transcript Sep 24, 2005] Reference

Al-Manar TV, the Hezbollah affiliate station, shows a vapor trail arcing up into the sky.    From Wordnik.com.  [CNN Transcript Jul 28, 2006] Reference

Instead of like a large arcing wave, it's more like an extremely fast and high moving tide.    From Wordnik.com.  [CNN Transcript Sep 30, 2009] Reference

The winds were stronger now, the waves arcing high over the sides of the intrepid Fuzhou Dragon.    From Wordnik.com.  [The Stone Monkey]

And to make her point she spat a dark gob of matter, arcing it expertly into the open stove door.    From Wordnik.com.  [Cold Mountain]

The striking (arcing) depends on the level of voltage and on the distance between the electrodes.    From Wordnik.com.  [8. Protective, control and supervisory systems as important additional equipment for power installations] Reference

The track simply curved up against an unloading platform be­fore arcing back the way they'd come.    From Wordnik.com.  [Nor Crystal Tears]

Not so the catapults, though, and one by one, they sent great missiles arcing toward the To-gai-ru.    From Wordnik.com.  [Immortalis]

(After testing, no damage must be visible at the insulation, such as rupture, arcing or deformation.).    From Wordnik.com.  [Chapter 4] Reference

Some eyewitnesses thought they had seen something bright arcing toward the jet just before it blew up.    From Wordnik.com.  [Death On Flight 800] Reference

He looked past that vessel to the other ten, and to the ten fiery balls arcing gracefully into the sky.    From Wordnik.com.  [Immortalis]

During the closing sequence the working contact is closed first of all. 1 main contact 2 arcing contact.    From Wordnik.com.  [2. Important components of switches] Reference

From the strong winds, it has snapped, and it is arcing on some of the other power lines to the rear here.    From Wordnik.com.  [CNN Transcript Sep 5, 2004] Reference

Ultimately the focus was that center fuel tank and the suspicion is there was some sort of arcing, correct?.    From Wordnik.com.  [CNN Transcript Aug 31, 2002] Reference

She smiles in her childlike way and the baby smiles, too, a breath of forgiveness arcing back across the years.    From Wordnik.com.  [Birth Mothers, Seeking] Reference

 It swells, echoing the dunes opposite, then hollows forward to a thin line arcing over, tipping right to left.    From Wordnik.com.  [equilibrium] Reference

Quath plucked up a boulder in irritation and flung it skyward, arcing toward a distant herd of dull-witted grazers.    From Wordnik.com.  [Tides Of Light]

The equipment restart can lead to arcing and or sparks or ignition sources that you would not ordinarily get otherwise.    From Wordnik.com.  [CNN Transcript Jan 3, 2006] Reference

Major D said that as he crossed open ground he saw a grenade, thrown from the alley, fly over him in a "high arcing motion.".    From Wordnik.com.  [Khadr war crimes trial halted after his Guantanamo attorney collapses] Reference

And that could cause arcing, and if there's arcing and it's exposed to the vapors of fuel, you have a potentially lethal scenario.    From Wordnik.com.  [CNN Transcript Mar 27, 2008] Reference

The waterfall upstream descended in a streak of white from the crest above, arcing and fanning out majestically from a high ridge.    From Wordnik.com.  [Si'Wren of the Patriarchs] Reference

And it still comes and goes in squalls and you see the arcing of many of those electrical transformers blowing and the power lines.    From Wordnik.com.  [CNN Transcript Sep 5, 2004] Reference