Just now, as I was walking into my apartment building, a homeless guy was walking towards me. I immediately sped up my walk to the door and frowned extra hard to show him I meant business and wasn't going to stop to entertain him or hear whatever babble he was preparing to say. He just smiled and was like..."You shouldn't be so serious all the time. Being too serious is bad for your health." So I smiled wide after I passed him. Asshole.