One time in a bar in Hillsboro I walked by this chick with a awesome ass. As the line of people brushed through the crowded bar I reached backwards and squeezed her ass. She slapt the guy that was behind me. Henceforth I have refered to this technique as the "Drive By Ass Grabbing"
Bonus info: For fun take some friends to a crowded bar and see who can get the other ones slapped the most. Winner should have a drink bought for him by the losers.
