your most stupid/bizzare accident or injury

Nope   

I have tried to bang the end plug of a handlebar in whilst moving.

Imagine my surprise when the bike lurched across the road as I smacked the end of the bars !

Yep i have

At the Vitruvian a couple of years back.  The swim is 2 laps.  You swim 1, get out run round and back into the lake for your 2nd lap.  On starting my 2nd lap, i thought i would be clever and "dive" into the water like proper "triaffaletes", only to realise the water was knee deep.

Nothing to do with tri, but probably it was the one when I fell off a pogo stick and broke my nose. 

Mind you, I was only 11 at the time.

As a kid I was riding no handed on the way home with a record in a bag swinging from the handle bars. Record swung round and slid between spokes.

Bike catapulted me straight off the front. Nasty mess.

Although I also had a mate who tried to put his chain on whilst riding as it had come off the big cog. He got it on with his fingers in between cog and chain. Got about quarter of the way round before he got them out!

Marathon training in March. I landed on a bit of broken branch on the canal towpath and somehow catapulted it into my opposite ankle. It didn't stop me running but I still have the scar so it must have been deeper than I thought it was at the time - that or there's mud permanently tattoed into it 

Was out training in a storm, head down, next thing I know I wake up in hospital with concusion and amnesia. I'd ran headfirst into an oak tree

I was 15, rumours spread round school that I was dead, they had a year assembly to explain what happened and that I was alive, how embarressing .

It probably explains a lot.

In the mob, I was leading a squadded run, I turned to encourage some stragglers & shirkers, turned back to face forward again and BOOM straight into a concrete lampost.  I never even broke stride.

Stepped of a canal boat onto the tow path all of oh a 6 inch gap?Went over on my ankle face first into the mud. We were miles from no were so should have been OK but oh no and entire troup of ramblers popped their heads up over the hedge with all sorts of useful advise.Then followed the 3mph race on the boat back to the car to get to hospital.Luckily nothing broken but tore or ripped every ligament and tendon in it.

Another when I was a lad story - after 3 years of wearing a brace on my upper teeth, the Sunday after having them removed, cycling along quite happily along a country lane off for a days fishing, hit a pot hole over the handle bars and one of my straightened front teeth was left on the road - Dentist the next day wasn't amused.

There seems to be a theme here... towpaths, cycles, country lanes, probably best avoided 

At a family bbq I was bored with all the adult talk so had a game of basketball with the young ones, the lampost being the basket.  On jumping up to score a three pointer I landed on the kerb, broke my foot and tore the ligaments - one way to end a family bbq.

My young springer spaniel is currently housebound following a couple of operations and is getting increasingly restless. Our old pooch is really struggling with arthritis in the cold weather. A couple of days ago I was lifting the old pooch on to the sofa so he could be more comfy when the young nutter came bounding straight at me and head butted me. I am now sporting a very impressive black eye

I have a permanant scar on my arm from one of my cats - I just happened to pick her up one day when I was holding a hairbrush, it freaked her out for some reason and she gouged a lump out of me with one of her back claws. Don't you just love animals?  

Again not sport related, when I was 13 or so, at a fondue party (70s anyone?) held the chunk of food between my thumb and forefinger and pushed the fondue fork into it, through it and into the palm of my hand and of course being a barbed ended fork it wouldn't come out again too easily, oops.