
I'm doing some experiments
to show that the SIGNAL to move a muscle
The Big Bang Theory Season 10, Episode 19

When they see us coming,
that fire becomes a SIGNAL.
Game of Thrones Season 2, Episode 5

The seismic sensor isn't emitting
any SIGNAL now.
Money Heist Season 3, Episode 8

The point of a secret knock
is to establish a nonverbal SIGNAL...
The Big Bang Theory Season 1, Episode 16

And when we give the SIGNAL,
bring us back down.
Game of Thrones Season 4, Episode 9