Eddie the head said:
Space. You don't freeze the moment you touch it. It's like no one understands how heat works.
To be fair, this is more an issue with death by deprivation not really being particularly dramatic in real life, so movies ham it the hell up in general. It's not just space and heat loss by radiation, which realistically takes a while and is basically death by hypothermia, but you have people gasping and rolling about when they've got no water in the desert, frying from the inside out in minutes with heat-stroke, jerking about like someone attaching a marionette to a flywheel when they're electrocuted, etc.
With all these things, you just kind of clench up a bit or your organs fail and then you fall over. Just doesn't appeal to a sense of real drama, so they make stuff up to make it look cooler and put it in a time frame that preserves the drama. My personal favorite is explosive decompression. In real life, the volume change between 0 bar and 1 bar for the water/organic mixture that is a mammalian body is like a couple hundredths of a percent, and the damage comes from blood vessels rupturing so you basically bruise to death. In the movies, they take "explosive" much, much more literally and it's awesome.