I saw darkening clouds on the way back from work. "Hmm, rain," thought I. "No matter, I can ride in rain." Then it started the thunder and lightning. "Thunder and lightning," thought I. "No matter. It's very unlikely I'll be hit by lightning. I can still ride tonight." However, just now it's started hailing. "WTF? Okay, I draw the line at hail. I get the hint. I'm driving. *sigh*"
ETA: Actually I cycled in the end; the weather held off completely :)