You know you are missing a few screws

Or you are an ultra-running freak if you exhibit some/all of the following symptoms....

6 am is sleeping in.

You don't think twice about eating food you've picked up off the floor.

You can expound on the virtues of eating salt.

Your ideal way to celebrate your birthday is to run at least your age in miles.

You really envied Tom Hanks' long run in Forest Gump.

You put more miles on your feet than on your car.

You start planning vacations around races.

Have a shoes,bottles and flashlights collection that would make Imelda Marcos envious.

When at the start of a marathon you're wondering "Why is everyone in such a rush? Where the ##@@**!! is the fire?"

As an infant you were dropped on your head.

You sign up for a 10K and

You bring your own drinks,potatoes and salt.

You start fast and a six year old passes you.

You are the only one walking the up hills.

You are the only one around who is eying the bushes THAT way.

When someone asks you for a photograph and all you have are race photos.

When you don't finish on the same day as the winner.

You've started a race in the dark, run all day, and finished in the dark (if your lucky).

When you meet a member of the opposite sex you see:

A possible crew/pacer

A possible search and rescue team.

A possible source of race entry fees.

You are told *not* to run another marathon during the next few months (because that would be bad for your health), and you really follow that advice - by immediately sending off the entry form for a 50 miler.

You're running a marathon and at mile 20 say to yourself, "Wow, only 6 more miles left, this is such a great training run!"

You get to the 31 mile point of a 50 miler and say to yourself, "Wow, only 19 miles left!"

You know you are a clumsy ultrarunner when after running headfirst into the trail for the third time get up and continue running even though you are bleeding and covered in maple syrup where your gel flask exploded and you have another 20k to go.

You go for an easy 2 hour run in the middle of a storm and think it is fun to get wet, muddy and run through the rivers that were once trails.

You pass a swamp towards the end of a run and think 'How bad could it be?"

You go down a flight of stairs, uh, backwards, after an ultra and everybody laughs.

No one believes you when you say "never again".

Everything in your life is organized in different sized zip-loc bags.

You see the road signs listing various mileages to different places and think of how long it would take to get there on foot rather than by car.

Finally...When you can laugh and relate to all of the comments above.
As a wise man once said... any idiot can run a marathon, but it takes a special kind of idiot to run an ultramarathon...after all it's no more foolish than chasing a little white ball around a big lawn and trying to hit it into little tiny holes!
(Source)