WE'VE all been there. You've been stuck on the train (or plane) for hours waiting to get to your destination, and the sleepier you become the more you notice just how uncomfortable the seat is.

As you try to drift off you gradually slump over the edge of the seat. Your head tilts to the side and your mouth opens wide, perhaps accompanied by a string of drool running down your chin.

You may look quite ridiculous, but you just don't care - you're getting that much-needed nap.

Some travellers aren't quite as lucky, and reaching the land of snooze becomes an epic battle. Legs and arms become twisted around the seat and by the tray table, heads rest against poles, feet stick out into the aisle and fellow passengers' shoulders become headrests. Lucky them.

#Awkward: The most embarrassing holiday snaps ever

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Others hit the deck and splay out their aching legs and arms across the dirty floor. Eww...

But little did you all realise fellow passengers would be watching on and snapping away, capturing your embarrassing sleeping positions.

We've scoured the internet searching for some of the funniest sleeping traveller photos, including a collection from Twitter user @SleepyCommuters.

Enjoy.