i remember had this happen to a cat of ours too.
it was jump from about 18 m - 8 floor
cat was not moving at all too for a 3-4 days even without
any food only drink after the 2 day i think.
After the 10 days he was OK - started to move.
It was try to catch a bird - bad try.
And it was like 25 years ago
So, i hope your cat will be OK !