After entering the hotel room to verify the second sniper is dead, Sonny goes out on the balcony and gives a "thumbs up" to the rest of the team. Seal team members are certified scuba divers and "thumbs up" means they are surfacing, so Sonny should have given an "OK" hand signal, with the thumb touching the forefinger and the remaining three fingers pointing up. This is so the diver does not get confused under water and give the wrong signal.