Photo taken from: komby.com
You should, under no circumstances, hold it up to your face and start to pump furiously and try to pull it off. And, failing that, for the love of all that is good and decent, don't repeat the process several more times.
Should one fail to heed this advice, be forewarned that you will be carrying around a surprisingly well-defined reverse 'X' on your face at work or school the next day - and probably the day after that, it would appear.
So don't let what happened to . . . a . . . friend of mine . . . happen to you.