no way to stop the time bomb "sleep 100; echo BOOM"?

[Dan Jacobson]

Fellas, I was a bit disturbed to find that there is apparently no way
to stop the ticking time bomb:

$ sleep 100;echo cant stop the time bomb... BOOM

Sure, you reach for the trusty C-c or C-z ... sorry, BOOM.
So you say "I will issue a kill command, perhaps involving "%"", but
you must still first hit C-c or C-z ... BOOM.

So you say you will borrow another terminal at grandma's house ... no
fair, you must save the day without switching windows, please.

Anyway, here I am, staring at a problem 100 seconds away that I can do
nothing about [without cheating and using another window] ... anyways,
"never since I started this shell business back in '85 did I ever feel
so powerless".  Probably I was powerless all along... Wait: [t]csh and
zsh don't go BOOM.  sh does but it is bash.  ash does.

Oh, I bet this is some set -o thing that everybody else knows but me.
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