Also Ninja Warrior like obstacles, but you get the general idea - pain inducing, physically straining stuff.
You don't need a picture, but if you don't provide one, try to describe it in as much detail as possible
They don't need to be blood inducing either.
I call this one the Christ Clasp:
You grasps firmly onto a bar that is made of nails, so you must send the nails in your hands and hold tightly if you want to make it to the end. You must manually move the bar yourself. Failure to hold on and make it to the end will send you into the acid pool down below.
Apologies for the crude drawing.
The green is the 'acid', the bar thing is a close up of the bar itself, and the rest is the obstacle itself.