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This sets off pretty big alarm bells for me. Touching people is a pretty personal thing, and doing it with ulterior motives seems wrong. P.S. Don't touch me.

Sorry, but I will not ask you should somebody else's life be in danger. Touching, being a personal thing, is intended to take you out of your headspace and place you in the physical world (source: worked as an EMT in the past).

Touching people is a pretty personal thing

Yep, the increased sense of intimacy that can make somebody feel more obligated to you can also make somebody feel uncomfortable and pressured. It's a technique that can definitely backfire. Using it with strangers won't necessarily give you the result you thought it would. However, I suspect in a "call 911" type of situation the other person is already uncomfortable and it's worth psychologically pulling them closer in order to focus their attention.

Sure, in an emergency situation making someone uncomfortable is a pretty minor concern. I commented specifically because you said "works in most situations, not just a traumatic one". I think it's worth considering that adopting this strategy for non-emergency situations could well create trauma for the person being touched.

Increasing the likelihood of someone doing exactly what you are asking them to is an overt rather than an ulterior motive of accompanying nonverbal communication. (That said, people do have different sensitivities to touch and this can backfire, but in an emergency situation maximizing the expected results of the request to call aid is going to be the highly favored course of action.)

A life or death situation, and you're worried about someone tapping someone on the shoulder.

I'd worry about karma!

thats the point. It makes a general shout "Call 911" and makes specifically personal, "You, the person I am touching and staring into your eyes, call 911, now!"...

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