One time my biggest snake Emrys managed to tip his tub off the shelf it was on, it dropped about 3 feet to the ground and I'm sure his water bowl probably hit him in the fall. His hide thankfully is quite lightweight. I discovered it probably hours after if happened because I wasn't home at the time of the incident, but he seemed none too worse for wear other than the fact that he wasn't on his heating pad, since it was still attached to the shelf. Never saw any negative response from him about it after I set him back up, though I did anchor the tub down to the shelf after that.