Every Bank Holiday August, the town of Llanwrtyd Wells hosts one of the country's strangest contests - the Bog Snorkelling Championship. If you don't fancy all that thrashing around in the mud, take our online Bog Snorkelling challenge...
The game's not as easy as you think - you're not allowed to use normal swimming strokes! Instead you have to keep wiggling, splashing and flaying around (by alternately hitting the keys on the keyboard that randomly appear on the screen) until you start moving. Oh and don't forget to keep breathing (using the mouse to drag the bubbles onto your snorkel).
Warning: Like real bog snorkelling, you should take a rest between races and stop racing if it becomes painful.
It's a challenging game but it's a lot of fun... just click on PLAY to start.
The aim is to swim two lengths of the screen.
Using the mouse with one hand, drag the bubbles onto your snorkel.
Use your other hand to alternately press the two keys on the keyboard which will appear at the top of the screen.
As new bubbles appear, drag them immediately onto the snorkel.
The pair of keys you have to press will keep changing so watch for new instructions at the top of the screen
You'll do much better if you take a rest between games
Hitting the keys hard doesn't make you go faster - you'll just break your keyboard!
Get a time of less than 160 seconds and you can challenge a friend.
Note that we'll be clearing the high scoreboard every couple of months to give you a fair chance of getting your name on.
Good luck!
Have you got any top tips on how to play this game? What's your secret tactic? Share your snorkelling skills by sending an email to wales.mid@bbc.co.uk.
