What's the difference between waking someone up because they are snoring and waking someone up because you need to get out for the toilet, get your meds out of the overhead or get water?

I'm not claiming there is or there isn't, but I'm curious about what people think.

This summer I was woken up on a long flight by a woman straddling me and struggling to finish her gymnastic attempt to climb over me "because she didn't want to wake me up." It was the least graceful and top-10 annoying things that happened this year (so far).