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Yeah, Dan, that's EXACTLY what I was saying. Good job reading between the lines.
For those who'd like to consider this seriously . . .
The idea that your bolting buddy will be close enough to grab on to is likely a myth. Bolters don't tab you on the shoulder before they take off. Unless you're looking right at them and they're no more than arm's-length away, they'll likely be out of your reach.
You also need to consider what the eventual outcome is. IF you do catch them and slow them down, can you get a reg in their mouth? Will they simply fight you off? (Remember, they're not acting rationally.) Will you end up with TWO victims instead of one? If you do slow them down but you can't get the reg in their mouth, will your actions end up drowning them when maybe they could have been saved even if they embolised? And even though they're bolting, everyone's assuming they're going to fatally embolise. Maybe, maybe not. I don't have any hard numbers but not every bolt ends up embolsised and not every embolism ends up dead.
This isn't a simple scenario with only one or two outcomes.