It's just happened: that old aunt finally passed and you think
your ship has come in. Or perhaps the email you just saw
from your boss finally broke the camel's back, and you're about
to jump up, wave your hands wildly, and perform the "fuck
you, and you, and you, and you, and you too!" routine
that
you've been dying to perform for the last twenty years.
This seat belt will act to restrain such unhealthy impulses for a
micro second or two, until you've had time to call your wife
and verify that you, and not your annoying cousin Jimmy is
getting the inheritance, and let that adrenaline drain from the
reptilian parts of your nervous system so that you can go back
to the productive work you so cherish.