Okay - we were watching TV, seated on the couch.
Snowy decided that he would avoid climbing over Jasper the black Lab, and would leap with feline agility like a Crouching Tiger, from the arm of one couch - onto the arm of the other couch and thence settle on my lap for a schmooze and snooze.
However - Snowy did not allow for the fact that a blanket was draped over the arm of our couch. So, he tensed up like a coiled spring, leapt into the air, hit the blanket with his front paws ...claws engaged with the blanket, it slipped down vertically, rapidly taking Snow with it.
There was an embarassing thump and Snowy hit the deck. We laughed loudly. Snowy skulked away sat on the Flokati rug with his back to us, seething with resentment and humiliation and whispering special cat swear words in our direction, through his perfectly gritted little cat teeth.