Has little or nothing to do with anticipated results. It's not limited to sports or competition. You can choke on an assignment for work, choke in an attempt to seduce a crush of yours. Jordan missing a free throw. You can choke anywhere, anytime.
Choking is when you had control, and failed to execute.

What happens is you are suppose to be focused on what your eyes are viewing. But your weak mind chooses to worry about something negative whether real or not, past or future.

It's bigger than that

It’s an acronym standing for Can’t Remember A Fucking Thing. It’s usually used to describe embarrassment at being unable to remember someone (CRAFT moment); going onstage as the lead in the latest theatrical performance and your mind goes completely blank (CRAFT situation); the next morning after a night when you got pissed as a fart and woke up in bed cuddling a traffic cone and a string of fairy lights wound round your prick.

a pidgin (slang) word commonly used in Hawaii to describe something that there is a lot of.

If you have a lot of something then you have "choke" things.

being up 3-0 in a best of 7 series and still losing. (see Yankees)

n. A small hole in a pipe, bong, or other smoking device with a smoke holding chamber. Located at the end of the chamber farthest from the smoker's mouth. A thumb or finger is placed over the hole during the initial inhalation so that smoke can be sucked into the holding chamber. After the chamber is filled with smoke, the choke is released and the smoke sucked out of the chamber with fresh air rushing in through the carb to displace it.

Alot, numerous.