Although most drive-thru attendants are quick to fix food-order mix-ups, we're sure most have never encountered dry ice in a customer's drink.
In this prank from J Stu Studios, Justin Stuart and Andrew Scites (with the help of friend Kevin Neary) seriously confuse drive-thru attendants by stealthily adding dry ice to just-ordered soft drinks. Watch the clip, above, to see the attendants' stunned faces upon returning to the window to see the now-steaming drinks.
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Stuart told Mashable he came up with the idea while brainstorming science experiments that could be used in an effective prank.
"Everyone knows what dry ice is, but no one ever took it through a drive-thru and pranked people," he said. "I guess paying attention in science class pays off."
Check out the video, below, for a behind-the-scenes look at how Stuart and Scites pulled off the hilarious prank.

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Video courtesy of YouTube, MrNuclearCat
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Image: YouTube, JStuStudios