..... even if I do say so myself! 
Firstly, I have no idea if this is a good idea. It was a complete mistake, so I'm not saying everyone should try it. Certainly not if you have sensitive skin.
I was doing my weekly face mask with, what I thought, was my Avene soothing mask, but after a few minutes, I noticed quite a lot of tingling. I just thought maybe it was because my skin had been more exposed to the sun recently.
I went to wash it off after 15 minutes and my face was really pink. And I mean, PINK. Was a little sore, a bit burny, so I went to double check the tube, panicking at this stage that I'd put some sort of industrial cleaner on my face by mistake
but it was actually just the Avene cleanse and polish, so basically just a cleanser. Obviously still not advised to leave on your face though.
Anyway, after about 30 minutes, my skin went back to it's usual colour, but it was like I'd had a professional facial. My skin looks and feels soooo smooth and I'd say it's taken a few years off me.
Again, I'm not suggesting you all go out and try this, but would be interesting to hear if anyone has done/does do this.