Just guessing,
I once lusted after a USSR 1960s fighter pilot helmet (for on my bikes) but the guy wouldn't sell it.
(
FeralCatMan Unusual disease collector.,
Mon 4 Jun 2012, 15:25,
archived)
maybe he thought that making your bike wear a helmet was mental
Oh wait, I think I got confused.
(
discomeats This canoe,
Mon 4 Jun 2012, 20:59,
archived)