1. In-N-Out was California's first drive-through hamburger stand.
2. As part of In-N-Out's not-so-secret menu, you can order any combination of meat plus cheese up to a 4x4.
3. A customer in Las Vegas once ordered a 100x100, which is when the 4x4 max rule came into effect.
4. There's a LEGIT secret menu that is super off-off-menu.
5. In-N-Out's religious verses on cups and hamburger wrappers didn't start until the 1980s.
6. There's an In-N-Out University... A UNIVERSITY.
7. Much like football athletes, In-N-Out trainees' skills are videotaped and analyzed for their performance on the job.
8. You can buy In-N-Out Uggs. And a tracksuit. And pajama pants.
9. The first "animal style" burger was introduced in 1961.
10. A manager at In-N-Out makes at least $100,000 a year.
11. In-N-Out has one of the lowest turnover rates in the fast food industry.
12. You can order a burger to be cooked medium rare. (!!!)
13. Julia Child was a rabid In-N-Out fan. She carried a list of store locations on her at all times.
14. The iconic arrow logo stands for, "The arrow points to pride," and, "We all work under the same arrow."
15. The original In-N-Out founder, Harry Snyder, owned 50% of a drag racing strip in 1965.
16. At 32 years old, Lynsi Torres is one of the youngest female multimillionaires.
17. None of In-N-Out's food is frozen or pre-packaged.
18. There are seven different ways to order your fries, including fries light and fries well done.
There's also the favorite, animal style...
And the old faithful: regular fries.
19. If you're vegetarian, you can order a grilled cheese or a veggie burger!
20. And you can also score a Neopolitan Shake to top things off.
21. Most In-N-Out's have a pair of crossed palm trees out front, because the founder got the idea from the film It’s a Mad, Mad, Mad, Mad World.
Warning: A representative from In-N-Out contacted us after this article published to let us know there is no such thing as "Monkey Style" and they've never served bacon. So, don't try to order either of those... unless you want to pressure them to serve both of those things. In which case, fight the good fight.