Ahmed drove through red light and Moshe drove straight into the side of his car, causing a big dent. Ahmed was furious but Moshe calmed him down and said: “listen, all you have to do is blow hard into the exhaust, and the dent will pop back in place”.
Ahmed liked the idea and started blowing with all his might.
After a few minutes Mohamed came past and started laughing loud. “What’s so funny?” demanded Ahmed.
“You are wasting your breath” replied Mohamed, “you allow all the air to escape, as you left your windows open”!