You can tell the scientific reason or just share your experience with the subject it's really fun to read always.

I come up with pretty clever names and ideas when programming but if someone is watching best I can do is muscle memory.

If I wrote an essay while someone else is watching it would look like a middle-schooler wrote it.

Same situation when I am in an exam room with 5 other people is completely fine.

Hell I used to work at a warehouse but I attempted to tape a box the sticky part up one time because the supervisor is watching.

He just looked tired after seeing tip of the tape get dragged across a box like some cat toy.

Is it magic?