To go ballistic means to become wildly or uncontrollably angry, but the motivation in this sentence is for him to stay calm and level-headed.
Context: Just in case I needed some motivation for him to stay calm should he be likely to remain level-headed with me.
Hypothesis: Just in case I needed some motivation for him to calm down should he be inclined to go ballistic on me.

Given this context, is the hypothesis true (Yes/No/I don't know)?