Haha, I chicked a guy today but I wasn't trying to be nasty and he WAS on a mountain bike. I caught up with him at a light but he was still ahead of me. We were getting close to my big hill so I didn't feel like going very hard. I saw his massive calves and quads and decided not to bother passing him. Well he saw me behind him (I stayed fairly well back) and I guess he kept expecting me to pass him but I just toodled along to get my legs rested for the climb. I could see he was working hard to stay ahead of me and he kept checking to see if I was still there. Eventually, the grade increased a little bit and I started to gain on him so I decided enough as enough and it was time to pass. I jumped from 20kmh to 30 kmh in one shift change and flew by him, smiling a hello as I went by. He was friendly and said hi back. I think he was relieved that I was past him though...