The Mighty Atlas
You've probably seen the old feat of strength where a strongman puts an anvil or a large stone slab on his chest and lets someone hit it with a sledge hammer... but I guarantee you haven't seen this feat before though, -- "The Mighty Atlas," Morris Shapiro, a professional wrestler from Brooklyn, New York, teeth-lifting an anvil while someone else whacks said anvil with a sledge hammer.
Now that's impressive!
The Mighty Atlas often demonstrated feats of strength before his matches, bending iron bars, snapping chains, ripping phone books etc. He learned the secrets of strength from his father who was a strongman in the Russian Circus in Minsk.