Don't know if this could happen when RF (my DS is 38lbs so now FF) but twice now when driving he tells me he is undoing his seat. When I look he has his hands through the slits for the RF belt path and has the lock offs undone! Like I said I would have to try and see if he could do it if the seat was RF but a warning if it is possible I know we aren't supposed to lock the belts with the lock offs but that would be all that would be holding the seat in...