So as I was riding along today, some people decide to step out into the road. This caused me to vear into a giant pothole- well the front wheel missed it, but the back wheel went right though. Anyway, 10 feet down the road I hear that always depressing hissing noise of all the air leaving my rear tire. So I stop, walk down to a nearby coffee shop, buy myself a cup, and proceed to sit outside and fix the flat.
So here is the curious part. I fixed it, got back on, rode off. This is when I realized my back wheel was lopsided. Fearing the worst, I figured that the pothole had bent the rim or at least knocked it out of true. So, I turn the bike upside down and set it next to a signpost for reference and spin it. Well, the wheel is perfectly fine, but for some reason when I put the tire back on there was an 8cm section or so that was sitting really low in the rim. Sort of like the beads hadn't engaged properly or something.
Does anyone know what I did wrong to cause this to happen?