I think acrobats are the strongest freaks I have ever seen in my life. Here is my acrobat-inspired list of bodyweight (!!) variations I saw them do in Cirque Dreams Jungle Fantasy
Easy: partial one-legged squat
Medium: pistol one-legged squat
Acrobat: partial one-legged squat into a backflip
Easy: seal-hop pushup (all four appendages off the ground)
Medium: seal-hop over a jump rope
Acrobat: seal-hop over a jump rope with two other seal-hopping men on your back
Easy: iron cross
Acrobat: iron cross while being swung around the stage with a girl standing on your shoulders

Easy: overhand grip pullup
Medium: overhand grip pullup to tricep extension
Acrobat: overhand grip pullup to full handstand over 5 second count holding your brother's wrists instead of a pullup bar
Here it is on YouTube, it's the first move they do

