Actually, ninjitsu has some uses.
I used to laugh at it all the time. Especially at this acquaintance at work who used to do it. We gave him so much crap about being a ninja and nicknamed him 'Shinobi'.
Last christmas party with all my work mates, 'Shinobi' got called out on the street for wearing a cheerleader costume (It was a theme party don't ask).
We were with 6 guys and about 12 girls. The other group were a bunch of 10-12 guys. They stood about 5-6 metres away from us having words with 'Shinobi'. We were just trying to get him out of there.
The other group started to make comments about the girls as well. Thats when our ninja-buddy pegged a large Australian 50c coin at the other group's biggest dude. It was at a distance of about 6m, I don't know if it was just a lucky shot but the coin smashed the guys front tooth right off.
The look on the guy's face when the coin hit him was priceless. It was like a ninja had just punched his dick off and he couldn't believe it.
The group wanted nothing more to do with Shinobi and we continued on our merry way. Pretty funny in retrospect.