I'm sure that it will but will it do so safely when traveling at the speed of sound? If I jump from an airliner into the ocean I'll naturally come to a stop du

I'm sure that it will but will it do so safely when traveling at the speed of sound? If I jump from an airliner into the ocean I'll naturally come to a stop due to water resistance but I don't think I'm going to enjoy that very much. This is a genuine question by the way, I really don't know what kind of deceleration to expect in this situation. It just seems like in this situation the train would behave a bit like a piston meeting the rushing wall of air head-on. I can't imagine that it would make for a particularly gentle stopping.