Went to the beach for the day with friends back when I was 17; didn't apply any suncream for about 6.5 hours out in the sun, before finally putting some on for the last 1.5 hours. Oh boy, did I burn.

Every feasible exposed body part was burnt. Even the parts I didn't know would burn. Did you know that you can get sunburn on the tops of your feet? I do now...

For the next three days, it hurt so much. Every movement, every contact; even lying still in bed hurt. More fool me, of course.

I, like Xanthe, had bad blistering, which would get sweat/water underneath it. Peeling it off was weirdly satisfying, like picking a scab.