When is a door not a door?

When it's ajar!

That's the first joke/pun I remember discovering. I read it in my Playhour comic, circa 1958-9. I probably had to have it explained to me, but it stuck in my head. And it's proved useful for today's blip. Thanks to Laurie54 for hosting today's Mono Monday challenge to think of a joke or pun and portray it as a photo. 

I was getting ready for bed and realised that I hadn't even taken one photo today, never mind blipped. So it was a blip-saver!  Phew!