What does Hank do in order to decide whether to go with Carl and Agent Baxter in Chapter Ten?

Hank tells Sarah that he has Carl's gun and that he's going to be able to protect himself if Baxter turns out to be Vernon. Sarah tells Hank he shouldn't go, and Hank finally admits that he's afraid. Hank then tosses a coin, hoping that a flip of the coin will tell him to go home. When the coin ends on the side that Hank had said would mean he should go with Carl, he decides to flip again.