My first thought was that the door knob had shocked me somehow. Then when I looked closer there was a scorpion crawling on the inside of the door. Just under the latch plate.
Thankfully the sting wasn't too strong but I certainly felt it. Like a pin prick or a bee sting. I quickly put a few drops of full strength lavender essential oil on it, and rubbed it in good. Then I wrapped an ice pack around my hand for the next hour or two. I'm not sure which helped more but the combination prevented my hand from swelling.