What's the stupidest thing you've ever done?

One lazy morning i treated my girlfriend to a massage...i spent ages gently massaging lotion into her skin...sliding my hands up and down her back...across her shoulders...down the sides of her neck...dragging my fingertips down her spine...massged her tired legs...up her calves and along her thighs...gentle sighs of pleasure as i eased away all her tensions and sent her mind into a beautiful, relaxed state....then i picked up her cat off the bed and threw it at her back, where it landed with all four paws worth of claws fully exposed.
I mean, what the fuck was i thinking? I thought it would be funny at the time to lower the little feline gently onto her back and make her jump a bit...only it all went wrong when the cat panicked and dived out of my hands like it had just seen a fucking field mouse run across the sheets.
My girlfriend then proceeded to let out a scream, and roll over to see what the fuck happened...when she rolled back there was, err, blood...on the sheets...from the two big gashes across the back of both her thighs.
To say i felt really bad is a slight understatement... :(

Just read this, Scott.... that is possibly one of the funniest stories I have ever heard!