I've had that problem before. I almost panic sometimes, when I get stuck with it over my head and shoulders, with my arms up in the air and helpless.
once when that happened, it actually got to the point where I was so completely stuck that I finally decided to ask help from the shop-keeper... who had just stepped outside to talk to someone next door I almost tore that dress in half trying to get out...

I haven't been able to afford new socks, and haven't seen many around lately anyway, and mine are all getting holes in them