[Once Osomatsu's hand goes right through Jyushimatsu, he retracts it pretty quickly with a bit of a disturbed look on his face.]

Uwah...

[It's a little creepy, honestly. Being able to just.. shove your hand right through a guy. But it's not like it's Jyushimatsu's fault that he's made up of mostly shadow, and actually he looks to be a bit down about it. Though who can really blame him? It's probably pretty lonely, not being able to really touch anything...

Osomatsu stares at Jyushimatsu contemplatively for a moment, before he reaches with his hand again, shoving it right through Jyushimatsu's chest. He gives his brother a smile, and waves his arm around comically while he speaks.]

Hey, it's pretty cool though! D'you know what kinda pranks you could pull on people, being able to go through stuff like this? Like one of us could hide behind you until someone walks by, and then we could burst outta your chest like that one movie or... or you could shove your head through the bathroom wall right when Choromatsu's about to take a dump!

[why is it always choromatsu]

It opens up a whole new world of gags!