B-fold is right, even a 12 year old girl should be strong enough to spot you, if you are using correct weights. Usually you only need about 5-10 lbs of force to get the weight past your sticking point. That is unless you're totally fried, hurt yourself, or have gone way past your limit. However, I can understand wanting a big burly dude their just in case. I was once spotting someone and the bar slipped out of their hands. It took all my strength to get it off him.