One passenger has starting collating photos of the funniest sleepers public transport can offer.
Twitter feed Sleepy Commuters publishes pictures of knackered workers snoring their way through journeys on trains, buses and Tubes.
Users are invited to share their best images of anyone they have caught napping.
Exhausted passengers are seen sleeping in a variety of extraordinary positions – slumped almost out of a seat, lying on the ground and even with a nose mashed against a pole.
Other entries include a man exposing his hairy stomach and another dozing with his head on a sleeping woman’s chest.
The brilliant photos show that if you are tired enough, you really will sleep anywhere.
One man manages to catch 40 winks despite having his head on the ground and his feet up in the air.
Another seems to be suspended between two sets of seats.
In one image, a transport worker is seen trying to wake a commuter who has collapsed on to the ground.
The page has gained more than 30,000 fascinated followers after just 43 tweets.
Its blurb simply reads: “All the best sleepy commuters in one place. Send us in your best pictures and they may be published – what’s not to like? Train, Bus, etc…”
Short, jokey comments are added to each photo, including “gold”, “oh dear” and “this is slightly strange”.
More worryingly, the sneaky photographers have occasionally gone further than just taking a picture.
In one image, posted along with the word “Hungry?”, a man is seeing pushing a sandwich into the face of a blissfully unaware napper.
So next time you feel your eyelids drooping, give yourself a shake – unless you want to end up as the unwitting star of the sleepy commuter show.