08-25-2009, 07:04 AM
It's likely a reference to the fact that Kuririn, Tenshinhan, Pikkoro, Gohan, etc could raise their power levels which was not something Vegeta and Nappa were accustomed to before fighting on earth.
When they came to earth they found that the inhabitants could not only lower and conceal their power level, but that they could also sense ki in other people.
When they came to earth they found that the inhabitants could not only lower and conceal their power level, but that they could also sense ki in other people.