Nanaca Crash!!

My time killer of the moment, Nanaca Crash!!
Basically, you send this guy flying by hitting him with a girl on a bike. While airborne, you can add additional distance by utilizing 3 "up" boosts and 1 re-usable "down" boost. Also, if he hits a girl on the ground he can get more boost or a "special" boost, hit a guy and you slow down. That's all I can figure out, the instructions are in Japanese.
Simple, yet addicting. Try and beat my high of 1763m.
Nanaca Crash!!