I will almost never pass up a chance to be silly in front of kids. I've often been described as the biggest dork on staff at the elementary school I teach at for some of my past stunts such as coming in full costume to teach a lesson on colonial history (even wearing said costume on a trip to Colonial Williamsburg), and using a telescope to solve math problems with my students. I work with students with special needs so any chance I can to make learning fun not only helps them, but is usually really fun for me too.
I can be incredibly silly, but to my friends I'm also known to be incredibly serious as well. I care about a great many things and I fight tooth and nail for those I care about.