Opening a cardboard door...

There was a cupboard in the corner of the room. I reached out my hand and gripped the door handle. I pulled the door towards me, thereby opening the cupboard.

Turning off a light...

A light in one of the rooms of my house was on. I decided that I didn’t need the light on any longer. I pressed the light switch thereby turning off the light.

Looking at a wall...

I was standing quite near to a wall. I turned my attention towards it for a few moments. Having done this for several seconds I turned away from it and carried on doing something else.

putting a piece of junk mail into the waste paper basket...

I discovered a piece of junk mail on my door mat. I carried the item away from the front door and held it above the waste paper basket. I opened my hand, thereby allowing the piece of junk mail to fall into the basket.

standing in the middle of the room...

I was standing at a central point in the room. The walls were all at approximately the same distance from me. I continued to stand there for a few moments.

Scratching my knee...

My knee had a slight itch. I reached out my hand and scratched the knee in question. The itch was relieved and I was able to continue with my activities.