Idiom:
Practical joke ( prank )
Hit the book:
Stage fright
Phobia
Athlete
Impairment
Mime
Timid
Arthritis
Impose
The first step in mastering stage fright, and all kinds of performance anxiety, is to get a good understanding of just what kind of problem you're dealing with. There's a trick to stage fright, as there is with most phobias, and you really need to understand the trick to find the solutions you need.