I too just saw this thread since my home computer isn't working to well so I have to wait till I have time at work. But anyway...

Katiebug did the exact same thing one time. She and Brianna were playing really hard on the cat tree and Katie jumped from the top..she hit the floor and let out this horrible blood curdling scream...came hobbling over to my feet and rollled back and forth on the floor growling and screaming. I too thought the same thing...but I couldn't touch her for about 5 minutes or so..they felt like an eternity. Once I was able to touch her without her screaming more I carefully put her in a carrier to take her to the vets. I kept getting ready for work and watching her. She seemed to be fine after about 30 minutes or so. I checked her leg and it seemed to be fine. I let her out and she went back to chasing Brianna!!!!!!!!

I phoned my vet later in the morning and she said that cats have this nerve that they hit sometimes when jumping and playing hard. It is sort of like hitting your funny bone which isn't funny at all. Some cats are just way more dramatic about it than others. I guess you and I have the drama queens huh???

Glad your baby is fine.

Denyce