It's always nice when someone actually gets a little perspective on your passion... particularly coworkers who don't seem to understand your sport or level of participation.
My buddy is a HS teacher, and when his kids actually see the pics/vids of his riding they seem to have a new found respect.
I'm a fan of being the trail "sleeper". I'll show up to an unfamiliar trail system and ask for directions (or to tag along) on the more challenging trails and often get fairly dismissive responses regarding skill level etc from the racer kids... until I hold their wheel down. At the bottom it'll usually lead to a nice chat and some new friends of sorts. Grey hair - don't care.