I really like in superman vs batman when superman is depowered and as batman is hitting him in the face repeatingly, he gains his invulnerability back, I thought that was quite a clever touch and well played !
Just thought of another one , return of the Jedi , when darth is fighting Luke and throws his lightsaber at him, Darth then walks forward and your hear his lightsabre turn on, you just know he's used the force to pick it up , you just don't get to see it. *geek mode*