I think an additional effect is that, the drop in pressure causes any liquids exposed to it to vaporise, which is an exothermic process, and it’s a race to see whether it boils off entirely or the inner part freezes to solid from the drop in temperature through conduction. So the immediate surface of your body would either dry out or flash freeze but the inner part take a while to solidify.

Why there is any ice in space and it doesn’t just sublimate away over time I’m not sure.

I can pop my ears whenever I want, like someone else mentioned. Handy on flights, but I haven’t been able to teach my kids how. If I forget to blink for a bit and then blink involuntarily when my eyes itch, my jaw snaps shut also involuntarily, causing my teeth to snap together. I can roll my tongue, which is apparently a genetic thing. I can hear high frequency sounds, like bats, and rodent repellents. It can be painfully loud when noone else around me can hear them, so they have a degree of disbelief if I mention it.