Muscle Growth & Body Modification Round-Up

Our thanks to Ian Ricky for recommending the following videos. 

The first clip is less about growing muscles than growing a clone. It's from Smallville (S02E09 and S03E09):

 

Next, a french commercial where a caveman reveals that he has evolved:

Back to muscle growth in an amateur commercial ("Mutant Amino Ad"):

Finally, two animations by Icecypher. First, a muscle growth reversion in "Hulk's Ultimate Attack":

And some muscle growth from Beast Boy: