This is why you need sharp floor people who understand poker so they can make smart and fair rulings when a special case comes up. This, however, was a special case in which the four card flop was not noticed right away and action took place on what was thought to be a 3 card flop. So that's a perfectly fine rule however it assumes that the four card flop is noticed right away before any action takes place, which is almost always what happens. This is a TDA rule and from what the staff has told me they are a TDA room. A floorperson will be called to randomly select one card to be used as the next burn card and the remaining 3 cards will become the flop. If the flop contains 4 (rather than 3) cards, whether exposed or not, the dealer shall scramble the 4 cards face down. Oh ya, not that it matters but the turn was another 2 and SB held K2 SB almost gets kicked out of casino but manager agrees to give him $12 out of the tray as compensation seat 5 and 6 agree no matter who wins the pot to give SB $10 back seat 5 raises, seat 6 calls, everyone else folds SB's head actually explodes-leaves money in pot, tosses cards into muck floor demands he put the $10 back in pot since there was significant action (BB folding) after his bet. SB blows his second gasket seal and takes his $10 bet back floor instructs her to wash the 4 cards that were on flop face down.