You'll want to distance yourself from the source, for starters-- like we did today. If it's not directly interfering with you, it helps. Also pay close attention to your breathing. You're going to want to inhale for a count of three, and release for the same count.

A lot of time, when people have panic attacks, their breathing becomes rapid and shallow, and that makes it difficult to get as much oxygen to the brain, rendering you shaky and lightheaded.