The ball landed in the rough but the lie is also very sandy.
The ball is setting on packed sand.
You are playing on a new golf course with waste bunkers and do not know what they are.
You are having difficulty hitting the ball in the sand bunkers while the sand is wet.
You release the club earlier than you should in the sand bunkers.
You are unsure of how much bounce to use in difficult situations.
Part of your ball is buried in a sand trap near the green.
The ball landed in a really long bunker with a high lip.
The ball is partially plugged in the side of the greenside bunker. You now have to hit the ball while it is above your feet.
You keep hitting the ball in the sand bunker despite the fact you plan on hitting into the sand a couple of inches behind the ball.