Kangaroos can be dangerous because of their powerful legs. They can lean back on their tails to deliver powerful kicks. In 2009, a man went to save his dog which had chased a kangaroo into a farm dam. The kangaroo was able to hold the dog underwater nearly drowning it. The kangaroo gave the man several big kicks before he was able to grab his dog and escape from the dam. He needed hospital treatment for his injuries.