a punch? Wouldnt that create some sort of gnarly, nasty ass, hole/dent? I though about just drilling it on the car with oil in the pan still to help push the shavings out and put a speaker against the bottom of the pan to collect the shavings that made it to the bottom. Then run a few quarts of oil threw it afterwords, but I decided NOT to take the untested route. Im a puss.