I used to make realistic-looking fake insects out of bits of cellophane, cardboard, paper, plastic, and wire.
Our bathroom light switch had a cord that went up to the ceiling near the wall. I would often face the wall, lean on it, look up at the cord, and give it a push so that it swung to and fro a little bit. Then I'd imagine that the wall was the ground and that I was laying on my stomach watching the cord miraculously defying gravity. After a minute or two it would seem quite real, and when I was done, I would have a bit of difficulty getting my bearings to get away from the wall.