When Gambol is playing pool, he has five guards; yet after the Joker jumps up from the pool table he only has three. What happened?
Two of Gambol’s men place the Joker’s body on the pool table. The other three were escorting the men who supposedly ‘killed’ the Joker. When the Joker jumps up from the table, we see him reach out with both arms, obviously killing the two men who put him on the table by stabbing them. This then raises the question as to how he stabbed both of them and managed to get a perfectly clean knife up to Gambol’s mouth. But let’s not forget that the Joker carries multiple knives at all times and that he is very fast, as he managed to get the upper hand on Batman twice in the film.