Antonius wrote:I once tried to gag myself with an apple. It could be easily spit out, or bitten through with a bit of difficulty. The only way that would work is if you managed to dislocate your jaw (big owie), put the apple behind all of your teeth, then set your jaw again (more owie). .
Which is precisely what I did as a teenager; at least with reasonably small apples (not the humungous ones you can find in supermarkets these days). I quite literally have a big mouth.

I wouldn't want to do it now though; my jaws aren't as flexible as they were then, and prone to muscle spasms if I open my mouth wide like that now.
Kyle wrote:An apple sounds like a choking hazard.
It is; that's why I don't recommend anyone do the kind of foolish things *I* did in putting a whole one (inside a sock yet!) in your mouth. I knew from my friends' reactions that it was a rare talent even then, but it's even harder for most other people (including me now) than I'd thought. I could also take in an entire regular-sized donut into my mouth past my teeth without breaking or biting into it. That of course is an even less ineffective gag but shows what a big mouth I had at the time.
But yeah, on the whole, apple gags either don't work or aren't safe when they are stuffed in.
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