I lost a pannier! I had both of them when I left work. I had both of them when I aired up my tires (to 100psi, ridiculous fast!). But when I got to Target, I only had one pannier! Luckily, it was the one with my wallet and phone and keys.
Unfortunately, the one I lost had my work clothes, my safety vest, my map, my first aid kit, my repair kit, some really good makeup, and so on.
I went back and retraced my entire route. I found nothing. I looked at the gas station, nothing there. I went all the way back to work and looked all over the station, nothing.
Dammit. I guess I'm going to the bike shop this weekend....