the Looping Deathtrap! I love it! A bicycle loop-the-loop circus act that I've never heard of or seen before

Found on http://fastisfast.blogspot.fr/

the bottom section is hinged and probably spring loaded to be the piece that quickly goes from up to down ramp. This is probably the coolest thing we'll see all year, and I'm gobsmacked that no one does this anymore!

By the look of the clothing, and bike design, I'd place this around 1905-1910