chemistry in action!
Humorously enough, the other people, who were biologists, had to keep asking me what the drawing was, always with the caveat "does it make me a bad scientist, that I don't know what that is?".
No, not knowing what a stick figure from another science is doesn't make you a bad scientist. Being a biologist makes you a bad scientist.
The "real" carving took place on the other side of the pumpkin, a pretty awesome raven by the wife, with an oral detail added later by a friend. We happened to be in Baltimore at the time, so a methamphetamine/raven combo seemed appropriate.
caw, caw ... bleaargh
Here's an action shot of the final triumvirate, and some of the other pumpkins.
The incredible pumpkin on the right that one of the other party goers made was accidentally dropped and broken earlier in the day, but you can't even tell after the emergency repair job.