You were cycling down the middle of a crowded sidewalk, (helmetless, of course). I was feeling grumpy and chose not to step aside. I bumped you with my shoulder and you got really angry. Someone reminded you that cycling on the sidewalk is illegal and dangerous. You threatened to beat me up. Luckily I'm too old to beat up, you said. I may be old, but common sense and the law are on my side: Cyclists: stay off the sidewalks.