Dr. Gero and Vegeta in “Unfinished Business”

You are a bit stronger than I anticipated. But it is nothing I cannot handle. Your defeat is imminent.

Vegeta

Heh heh heh heh heh heh heh. Yes, your friend managed to steal quite a bit of energy from me before I stopped him. Now's your chance to beat me. A vicious attack now could be sufficient.

[to himself, about Vegeta] How can he be so confident? What is he hiding? Yes, he is shrewd. He seems completely at ease, but is he?

Vegeta

Let me ask you this. What makes you think that you're going to do any better than him? You're an android too. I bet your head rolls just as well as his does!