I'm dyspraxic and bruise very easily so am often covered in bruises when I've not a clue how I got them but have still done some stupid stuff.
As a toddler, fell through someone's legs in the kitchen and ripped most of my lower lip off on the cupboard door catch.
Fell UP the stairs at work, smashing my knuckles into the iron bannister and fractured two fingers.
Slipped in the bath while having a shower, got tangled in the shower curtain, brought the rail down and fell against the back, resulting in a leg black and purple from hip to ankle.
Wind blew the car door shut on my hand, breaking two fingers.
Broke my nose playing hockey when tackling someone; a few years later I broke it again on the sights of my rifle in a competition.
Got a split lip and facial bruising playing mess rugby with an inflatable dolphin.
Cat walloped me on the temple with claws out and I got a black eye from internal bleeding into the socket.
Got a grazed cornea from the dustpan handle.
Most spectacular wasn't really an injury though. I had had a blood test and continued bleeding under the skin. Whole forearm turned black with bruising to the extent that you could see the outline of the bones. No one could believe that it was caused by a blood test, nor that it didn't hurt like a bruise, just sore and unable to move the joints.