Because they were weak
From Create Your Own Story
Gohan in a fury attacks you. You dodge his fists and you run into the training hall which is 100% indestructible. "Gohan there is no way you can win this fight," you say clicking your scouter, "your power level is only 19,000, while my power level is a whopping 48,000."
Gohan soon unleashes a barrage of energy blasts, you let all of them hit you. Gohan grows even more angry, his power level begins to rise, you click on your scouter and are stunned to find his power level at 52,000. He throws all his energy at you at once...
- Mystery optionWho can resist