In reply to balmybaldwin:
> I've got a simple exercise for you that will resolve this mystery.
> 1. Bluetac a poster to a wall with a piece of blutac in each corner (it does not need to have a hole in it)
> 2. carefully un-tac the bottom 2 corners of the poster and lift the botom of the poster up so it hinges on the top 2 pieces
> 3. imagine crawling through a hole under the hinged poster
> 4. let go of the poster - gravity will bring it back to where it started, and the blutac will re-tac
Odd that. Whenever I've blutaced something to a wall I've needed a bit of pressure from, say, a thumb. I've never known blu tac to 'self-tac'.