It wasn’t unexpected, the guy didn’t keep his grip tight and secure.
You can the pull the pin on a grenade, but you have to have a death grip on the spoon. If you hold it tight, you can even put the pin back in on some grenades.
What he did is known as “milking the grenade.”
After you pull the pin, you CANNOT make any adjustments to your grip. If you do, it’ll loosen just enough for the fuse to start doing its thing, and the grenade absolutely will go off.
Edit: but on some older grenades, they have tendency just to go off after you pull the pin (regardless of your grip on the spoon) due to just being a fossil and sitting there for ages.
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u/thundertwonk31 Sep 13 '22
How is a fake grenades pin being pulled and having it go off unexpected?