While waiting a long time at the start of an organized ride with a bunch of riders, my ANT+ wireless computer shuts off.
Reconnecting the sensors in the pack turned out not to be such a good idea: my computer picked-up other people's sensors.
It's a bit odd being able to see the heart rate of nearby random stranger! Hmm, I didn't know I had a power meter!
I reset the computer after we started moving and there weren't so many riders right by me.