I thought this could be the start of a fun and more lighthearted thread: What is the 'weirdest' (working) arcade game emulated in Mame that you've come across ?
I thought these should at least qualify as 'runner ups' :
PS: Perhaps this post should have gone into the 'The Loony Bin' instead of here in 'EmuChat', but the other threads in 'The Loony Bin' seemed too far out there.