Originally Posted by jfe
Some people say that the red light is manually activated when they see someone with too much crap with them, as in her case.
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I distinctly remember noticing the green light going on just before MrsCP touched the button ahead of me. To be sure, I reached out to touch and stopped about an inch short until I saw the light go on, then pressed it. No, I didn't make any wise remarks - I'm not that stupid.