High five, bro! In this hilarious new video from legendary prankster Jack Vale Films, Jack and his buddy Dennis Roaday hit the streets of LA to high-five members of the public. The twist? Their hands are covered in Vaseline! How will people react when they discover the slippery substance is now all over their hands too? Most of them see the funny side … but check out the reaction of the big dude at the end of the video. He’s anything BUT amused!