We all get nervous sometimes. Whether it's social interactions, a performance or an actual threat, the same mechanism is at play, just at different levels. Fortunately, as this video explains, you can do something about it.
This video from ASAP Science explains the science behind why we get nervous. It also talks about ways to mitigate your nervousness, including cognitive-specific, motivational-specific and other imagery techniques.
Why Do We Get Nervous? [YouTube]