If a picture is worth 1,000 words, this would be a gimongous post. Enough said.
The bicycle as an anti-theft device.
[youtube=http://www.youtube.com/watch?v=u9r6nd9ruNA&color1=0xb1b1b1&color2=0xcfcfcf&hl=en_US&feature=player_embedded&fs=1]
A bicycle without a fork.
[youtube=http://www.youtube.com/watch?v=7qiR7E3dpjk&hl=en_US&fs=1&]
The bicycle as a levitation device.
[youtube=http://www.youtube.com/watch?v=UbJ1sseQVbY&color1=0xb1b1b1&color2=0xcfcfcf&hl=en_US&feature=player_embedded&fs=1]