About three years ago we found this cat that at first was so shy and cute but as soon as it warmed up to us we where in for a wakeup call.She would literally jump off of everything.  One day she came running around the corner and jumped of my chest (6 foot male) then off our t.v. then off our banana chair and our son and this went on for about 3 hours...  man was I tired after the first 30 minutes to keep things from falling over.  I don't know how our little cat could go for so long.  Are cats normally this hipper?