On the night of March, 22, we had the first official activity of our hackerspace, and a big one: SJC Lightning Talks, which brought more than 150 people to check 9 quick presentations.
When speakers have to shrink their usual 45-minute presentations to fit in time limits as small as 5 ou 10 minutes,they usually start to mess up with other speakers slots. To keep all presentations, plus registration and meals, inside our 3h limit, we had to find a way to force speakers to keep the defined time limits.
Then came the idea to make a timer. Not a simple timer: A time-bomb. But a FAKE time-bomb, obviously. We still want the delayed speakers to be able to return on future events.