Deadly Beauty

The battle between Vegeta and Android 18 begins. As it ensues, Android 17 admits Vegeta is stronger than expected, but he is confident 18 will win. Once the other Z Fighters finally arrive, Vegeta refuses to accept their help. 17 agrees not to interfere with Vegeta and 18's fight, only if none of the others join in. The fight continues and it looks like Vegeta might win, but Piccolo figures out Vegeta's getting weaker while 18 remains strong. Vegeta realizes 18 was toying with him and gets clobbered. Trunks then transforms to Super Saiyan and leaps into battle to defend his father.