What did the people do at the blast of the horns that made Jericho's wall collapse?

Answer: Gave a great shout

When the people heard the blast of the horn, they gave a great shout, and the wall collapsed so they charged straight in.

“So when the rams’ horns sounded, the people shouted. When they heard the blast of the horn, the people gave a great shout, and the wall collapsed. Then all the people charged straight into the city and captured it.”— Joshua 6:20 (BSB)