Human powered boat

[z1ny]

thanks for inventing something that's been done like 100 times already.

[butlerproman]

I guess it's okay if you want to spend your time spinning around in empty space.

[lionronin]

CAD presentation, Not Boat!

[shanonobanion]

too much swooping and not enough explaining.

[rorymannetje]

thats like an canoe