Couple of shots with a sledgehammer!
And about the wheelchair, well you saw him just dance out of it and go on to win the world title at SS.
So? Triple H used weapons in the match and Shawn no-selled that.
Er.....a sledgehammer is a little bit different than a chair - which wrestlers can get hit with, but get up a minute later (OMG! NON-EXISTANT SELLING!!) - or a garbage can lid.
Ask your friend to hit you with a chair in the back. Then try a garbage lid. Then try a sledgehammer. See which one hurts you the most.
HHH used a chair several times (DIRECTLY ON THE BACK), plus backbreakers, garbage cans, and he did use the ladder. Then HBK NO-SELLS IT ALL. Then post-match, HHH kills him with two shots. Explain to me how two sledgehammer shots is worse than 20 minutes of work on the back with weapons.