I've never had another car that did this it so maybe I always bought cheap cars or maybe this is a mini only thing but when you take a corner really tight or fast the seat belts kick in to keep you from moving at all. Usually this only happens when you slam on the break. Makes me wanna take all my turns tight and fast.

Howard

 

Yep, those are the seat belt "Intertia Sensors" kicking in to keep your body securely strapped against the seat on tight turns or under sudden breaking.

Actually, the majority of new cars sold today have seat belts with intertia sensors built in them.

 

Don't lean forward fast or you will kick in the seatbelts