Like I said...form is the most important thing in anything. Back when I weighed 160, I was able to pick up and slam my 300lbs cousin. I couldnt lift 300 lbs if my life depended on it, but because I was able to get low on him, push him off balance, then lift his lower half with my legs, I could do it time and time again.

When I was 13, and only weighed about 110lbs (yeah...scrawny lil bastard back then, I know) I had a job in a warehouse where I picked up and lugged around 4'x2'x2' boxes weighing around 70lbs all day up and down two flights of stairs. Because I was jacked? Hell no...because I was able to use proper form to get the box on my shoulder, then its just walking around like normal.

Put some research into proper wrestling techniques, and you'll see how easy it is to slam a person (obviously, not so easy when they want you to, but the technique itself is very simple).