Partners in slime! Sandra Bullock and Neil Patrick Harris weren't afraid to get their hands -- and heads and shoulders -- dirty when they took the stage at the 2013 Nickelodeon Kids' Choice Awards on Saturday, March 23.

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Bullock, 48, and the How I Met Your Mother star, 39, were on hand to present the Favorite Movie Actress award to Twilight's Kristen Stewart. But as they stood at the podium, they found themselves on the receiving end of the action, doused in the face by a geyser of green, gooey slime.

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Bullock had been slimed before. In fact, as she stepped up to the mic, she jokingly looked around to make sure there wasn't a bucket of green goo above her head. Her co-presenter, meanwhile, whipped out a magic wand to conjure up a "slime-free zone" around them.

"What happens if you wave the wand the other way?" Bullock asked. Harris replied that he didn't know and then proceeded to test it out. Moments later, a fountain of slime erupted from the podium, drenching both of them.

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Of course, they weren't the night's only victims. Rapper Pitbull and basketball star Dwight Howard also experienced the network's signature green goo.

"I guess that's what we call a slime dunk!" host Josh Duhamel quipped after Howard's sliming.

This article originally appeared on Sandra Bullock, Neil Patrick Harris Get Slimed at Nickelodeon's Kids' Choice Awards: See It Now!