Fence, Bed and Torch Glitch

When I am up against a fence and two or more sand or gravel fall on me, and there is a wall on one side, I can be pushed into the fence. When I have a glass block with an empty space in between it and a block like a furnace, I can place a torch on the glass and it automatically switches onto the furnace. For the bed glitch, I can spin my fastest and place a bed and it turns into a funky double bed, and when I destroy the middle, It makes a half bed.