Turn off the lights, Janis
I seem to recall seeing at least a couple of columns in the American Philatelist and other hobby publications over the years regarding stamps with humorous postmarks. Some of the most innocuous cancellations can become quite eye-catching if they land just so on a stamp.
Here’s an example of what I’m talking about. Thanks to how the Energy Awareness Month cancellation landed right on top of this Janis Joplin stamp, it almost looks like Janis has a giant hand that she’s extending to flip the light switch just to the left of the stamp. Janis, you see, is all for conserving electricity.
What’s the grooviest (or funniest) postmark and stamp combination that you’ve ever seen?