Wow. Spank my inner muppet and call me Betsy, even. Don't ask me how I did it, but it seems I have managed to create an invisibility shield! Yesterday I had to go to the arseing hell on earth that is known as Tescos, and not a single person noticed me. I was absolutely amazed. I would push my little trolley up an aisle to get something, and people would just stand there, leaving their trolleys blocking the way so that I couldn't reach what I wanted, let alone get past. Small brats children ran into me and looked stunned when they hit me; obviously a surprise, as no way could they have seen me! One dozy bint woman even ran a pushchair over my foot. It was funny seeing the look on her face when my disembodied voice said 'Ow, that hurt! Can't you watch where you're going?' How I laughed after that...
Sadly, the shield must have worn off when I tried hoofing it out of the store without paying for the shopping*, but it started to work again as soon as I got in my car. It was hilarious**. Pedestrians stepped out in front of me, other cars tried to hit me, and a Tescos worker even pushed a huge gaggle of trolleys in front of me as I attempted to get out of the car park.
I wish I knew how to make it work whenever I wanted it to. I could make a fortune as a cat burglar!

*Didn't really, honest.
**Not.