You know your tired when...

[crudus]

when you are hallucinating. Not funny but true.

...when you look in the fridge in hopes of finding the mustard. =/

uhh...I don't get it

 

[Duffeknol]

When you write your instead of you're.

 

[JDLY]

When you fall asleep on the couch and wake up in the bed.

Also, there are some really funny ones so far. Keep this going.

 

[Amberella]

When I begin to fall forward onto my laptop. xD

 

[cannot_aim]

When you say something so incredibly stupid and badly planned that it almost ruins a friendship with someone you really like.

 

[Xpwn3ntial]

Someone inadvertently steals $1500 worth of your clothes and you can't bring yourself to get angry.

 

[SuperSuperSuperGuy]

I know I'm tired when I forget what I'm about to say in the middle of a sentence, or when I forget what something's called right before I say it. Or when my legs feel like they've been hit, individually, with a seldgehammer. Or when I spell "sledgehammer" as "seldgehammer".

I gotta go to bed...

 

[Eren Murtaugh]

When you're on your cell phone, but still looking for it, and complaining to the person on the other end that you can't find your cell. Multiple times in the conversation.(This, I've done repeatedly)

 

[Girl With One Eye]

When you finish putting butter on your toast, and then use the toast as a lid for the tub of butter.

 

[Tydanubus]

When you pee into the urn next to the toilet instead of the toilet. Seriously, who puts an urn next to a toilet?

 

[Boneasse]

When you're sitting in your chair in front of the computer searching for random stuff online, being too tired to actually go to bed.

 

[Nouw]

When you suddenly have a need for caffeine.

 

[Jfswift]

When you start nodding off in the middle of a deathmatch.

 

[Blemontea]

When you fall asleep...

in the middle of a game and then wake up the next morning to find the TV, the Game Console, Your Lights of, sleeping in your pajamas on your bed and when you turn the console back on its saved exactly where you left off, True story.

 

[dorkette1990]

When you start to see the walls melt into a wonderful silver goo that pools on the floor, and you feel rain even though you're inside....
Normally only after 2 days without sleep though....

Also, when you start to DM in your sleep. I've ran a dnd campaign and fell asleep for 20 minutes, but continued to lead my party through an adventure.

 

[theSovietConnection]

When you get to the end of Razorfen Downs, only to realise you don't remember queueing for a dungeon, and the last thing you remember was grinding your leathercrafting skill by Thunder Bluff.