Ya it actually didn't, I thought the funniest part was the expression on his face when he was laying in the couch. It looked like he was gonna crap his pants
Yeah, the Japanese really know how to prank people, and they can also take a joke really well... i've seen pranks where people were on a porter-potty and they would lift the whole porter-potty up in the air and then throw then drop the person on a slide with their pants still down...