What is the sound being made when there s only 10 seconds left in the round? (Boxing/MMA & kickboxing)?

lestermount2016-12-09T11:48:59Z

the man with the bell is tapping the floor as a ten second warning to the fighters and the ref. Now some rings have lights on the posts that tell them when it is ten seconds to go.

Leo2016-12-11T12:40:23Z

Pound table with your hand.