DIY Working Iron man Answered
Here's an idea that someone can use for the robot contest if they want, I would but I just don't have the money.
You buy 4 linear actuators (such as the ones here: http://www.firgelliauto.com/product_info.php?cPath=91&products_id=7
And you attach one to each limb, giving you super strength.
I just don't have like 500 dollars to spend