Also, positional asphyxia does happen. Sometimes an overweight person passes away after a prolonged physical confrontation, most of the time when restrained with both hand and ankle cuffs and laying on their stomach. It is a part of training to recognize this possibility. Again, if you fight with the police, you'll likely lose, and if you are fat, positional asphyxia may happen to you.

Therefore, don't resist arrest. Especially if you are fat.