Permanent link to this comic: http://xkcd.com/175/
Image URL (for hotlinking/embedding): http://imgs.xkcd.com/comics/automatic_doors.png
When I walk past an automatic door and it opens for me, I worry that if I don't go in I'll hurt its feelings.
Figure: Oh, um, I'm sorry, I was just ... um ... I guess I can hang out for a bit.