I just found these videos. I've been laughing out loud at this grandpa's reaction. Plastic wrap with corn syrup and red food coloring over the door. Some good points if you don't want to watch the full video, but I'd recommend it. 1:40 - Walks into it. Pants fall down. 2:45 - "I'm like a goddamn candy apple!" Diet Coke & Mentos prank. 0:50 - First explosion. 1:15 - Rips off shirt and throws it. 1:55 - Second assault. 2:40 - Street confrontation.