Yeah, Yasuo840 has had some cool creations (check out his 4X4 quad, 4 rotors+4 servos), but the Lego bike is by far one of his coolest.
His build had inspired me to attempt a "Bi-copter unicycle" version, but I have put that idea on the bottom shelf for the time being.
I have so many other things going on right now, that I can't afford to experiment at the moment.