You'd be caught in about two minutes if you tried to signal me from across the floor.

"I tried to signal you over the radio but got no response."

I tried to signal them, but they didn't see me.

Moments later, she spots a car and tries to signal them for help.

Thought it was you trying to signal for help.

We believe the downstreamers must be trying to signal us.

He tried to signal no, but she didn't understand.

The ones they used to try to signal Earth.

Perhaps he should try to signal Alexandria, get her out to see him without disturbing the rest of the house.

We'll stay here and try to signal them in the right direction.