I had to double de-clutch when I was taking my HGV test , it's ok as long as don't lose too much power while you're doing it because then you have to start all over again
If I just wear just a shoe, trainer, boot etc on the rubber foot it squeaks like f*ck. I wear a sock on it and change when it wears through , usually on the heel.
I got pulled and taken into a room in Greece once after my bag had been through the X-ray machine. They made me open a little tub that I had in my bag but were very disappointed when they discovered that it just talcum powder