I hear you on the crummy day at work. I got into an argument with my shift supervisor this morning, and then she held the grudge all day. Really professional... grumble...grumble... All I could think of all day was how great it was going to be to crank on the bike really hard all the way home to get all the frustrations out. When I got home, guess what? No stress! I love, love, love commuting!!!