original: Using their tail to support their weight, they deliver kicks with their powerful hind legs.
simplifications: They use their tail for support as they deliver kicks with their powerful hind legs. Using their tail as support, they kick with back legs. Using their tales for support, they kick with their powerful legs. They kick with their powerful hind legs. Their tail supports their weight. Using their tail to support their weight, they kick with their powerful back legs. Using their tail to support their weight, they kick with strong back legs. They can use their powerful hind legs to deliver kicks. They use their tail to support their weight. That is why they are able deliver kicks with their powerful hind legs. The can deliver kicks with powerful rear legs while using their tail as a support. They deliver kicks with their powerful hind legs by using their tail to support their weight.