Pretty ticked off this morning. I noticed that my right crank arm was loose shortly after leaving the apartment. Upon confirming this, I turned around for home to tighten it. I had left my multi tool at my parents' house so I decided to throw my 3/8" ratchet with 8 mm hex attachment in my backpack just in case. Well, about a mile and a half into my commute my crank/bb interface was making horrible clicking and pinging noises so I stopped to check on it again-well the crank arm decided it wanted to fall off this time. I took my time and cleaned the oil/grease from both parts with my shirt and gloves and re-assembled things once again. I was determined to make it to work and really hammered it to make up the lost time. I was also so pissed (this is the 3rd or 4th time they've loosened) that I threw my helmet down in disgust--shattering it in the process. I rode for a while holding my helmet before tossing it in a trash can by the airport. The only good thing was that I passed a guy who later caught my draft and thanked me for the "awesome pull". He looked to be a serious rider, so I guess that made up for all the frustration.