If you are among those readers who have never noticed, I hide little
symbols like that in virtually all my comics for no good reason. The
current list is:

Firecracker/dynamite,
eyeball
pie
alien
bunny
K2
O2
upside down bird
a man's loafer
a fish tail
a crown
and the exceedingly rare arrow in the back.

The number above the signature tells
you how many symbols to look for, a la Al Hirschfeld.

Aparently now being written by "Wayno."

Also note on Sunday, get the graphic from Seatle Pi.
It's clearer and they have a magnifier