I feel like I perform better when I am extremely anxious. 
When I was a student, I would always get better grades if I was very anxious before a test, because I focus so much on not failing. When I decided to relax and not worry about it for, let's say, a few hours before the test started, I would not get the same grades, even though I studied just as much during the week.
I noticed this happens very often in my life as an adult as well. If I stress about a job interview to the point I get sick before leaving my house, I end up doing better than if I let myself calm down.
Of course there is a limit, and if I completely panick, I also screw things up.

Is this something anyone can relate to?