What is Surfer's greatest strength feat?
I mean physical strength, and taking punches from people who are known to be strong/hurting strong people physically doesn't count, only feats against inanimate/common objects so they can be compared to other characters (like rocks, cities, islands, planets, stars, etc.)
The best one I know of is when some guy tried to collapse a bunch of asteroids all around him and crushed him under them to form a small planet, and he busted out of it.