BB and Jasper run into things all the time
BUT it is also because they are running 100 mph on wood floors! They never just run into anything without sliding and crashing! Jasper never falls off of anything, he takes his time and calculates his jumps landings etc. BB on the other hand is the most clumsy cat I have ever seen! Even when she is not playing she falls off of things! She will jump on top of my dresser and just hang by nails because she is sliding off! I certainly think you should have her checked out if she is runnin into things randomly!!! Better safe than sorry! I brought it up to my vet about BB and he said often times inner ear problems can cause them to be a bit clumsy!