Me, too!
I was feeling proud of myself for having watered heavily, then stood next to my suitcase at the door thinking "Is there anything I forgot? What's that funny smell?"
Steam coming up from the light fixture.
It reminded me what the British Columbia police were alleged to have said, back in the 1980s, when asked what resources they devoted to tracking down and arresting indoor cannabis growers.
"Oh, we catch THEM when they burn their house down."