The thing is, the button/coin flip is just a chaotic diversion, to distract his opponent and get her to lower her guard. Whether fortune favors her or not, it's hard to say, for as soon as she calls heads, Corwin smiles. "Heads, then. A good choice!"

And, without further ado, he uses his kinetic magic to send the button flying at incredible speed towards the center of her forehead, aiming to hit her right between the eyes. While she's distracted by this, he turns and attempts to make his getaway.