Xander's eye grew a bit wide when Spike came up to his personal space, but he supposed he would have to to find out of Spike was telling a joke (a bad one) or not. Wiping off his hands on his pants a bit, Xander did as asked and put two fingers where Spike's pulse would be had he one. Xander had had the misfortune of having to find pulse points quite a few times, so he knew how to quite easily. And Spike had a pulse! Which had Xander's eye grow even wider as he stared at Spike. "How? What? That's... That's impossible! You're supposed to be dead, no offense!"