[panic]

The sensors have a lot more failure cases, though, and it can be hard to tell whether they're working properly.

[macintux]

Reminds me of light sensors in bathrooms. Often you have to wave your arms to let the sensor know you’re still inside.

[panic]

Yeah, that's what I was thinking of too. Don't relax in the tub too long or the doors will unlock!

[jessaustin]

That could be a feature, for someone waiting to use the facilities...