Main characters: 1 8-wheeld transport, 2 boxes, box with rotation 45,0,0. Situation 1: transport stay on box by 4 back \ 4 front \4 left\right wheels, other part of wheels stand on same box. Second box deleted, car starts falling slowly like it's in the deep water. Situation 2: Car on box wit x.rotation 45, box deleted, same slowly falling (turning) in same step (front\back\left\right 4 wheels hit ground and gose "sleep-falling"). What i need: normal falling- if any side of car don't get any surface under wheels - it gose falling, hard and fast as real, not like in the deep water. Try to solve problem by: permanently - Rigidbody.WakeUp(), addforce on UNgrounded wheels, set brakeTorque to 0, set to 0.0001 wheel params, Rigidbody settings about sleep, Rigidbody mass & gravity settings, time settings. Nothing helps. So, any helps \ ideas? *UPD Add screens of problem, made simple and fast. (And yess, "play" turn ON).