At what point is a bicycle not a bicycle?

Is this a bicycle?

Example 1.




Technically it's a quincycle.

I actually like this thing. It reminds me of a band Mark introduced me to that sounds like nerds falling down stairs with instruments:



Like one commenter ... um, commented: This band is the sickest shit since Mr Bungle you shitheads!

Example 2.
This looks like BMX, but the dude has no chain! Some of these folk even run front wheels front and back! Maybe I'm turning into some sort of farty retro grouch, but I can't see the difference between this and a scooter. Conclusion? The cycle bit is the important bit. Not pedaling not bicycle. Give this kid a freecoaster hub, because I only want to hate on him because he's waaaaaaaay better at BMX than me.

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