Squeezing the last minute out of a session

It's too late now.

If you're the moderator of a panel and you want to rush through one more question...

Or if you're the speaker and you need to race through three more slides...

Or if you're a writer or designer and want to add just one more idea...

Or if you're the teacher and there's just one more concept to talk about even though the bell's about to ring.

Too late.

End with a pause.

End with confidence and calm and yes, please respect your audience enough to not expect that cramming is going to help us or you.

No one, not once in the history of timers, has ever said, "I'm really glad that they went over by thirty seconds, huffing and puffing and begging for attention. That was the best part, and I respect them for cramming it all in."