I really hope your little man ends up being OK, make sure you monitor his urine very closely for blood. I dropped one of my girls last year, not even 30cm but she tore the ureter going from one kidney to her bladder, she was fine overnight, it took until the next day for the issues to become evident. The kidney failed and the ureter ended up sticking to the artery in her leg and she essentially bled to death via her bladder over the course of the 2 weeks she lived while myself and 2 vets tried to figure out what was going on with her. Keep an eye on his mucous membranes as well, conjunctiva, inside the mouth etc, any sign of going pale means internal bleeding and will need a vet ASAP.
All the best at the vet tomorrow!