Cushion of psi

Before going to sleep, I practiced levitation again and it felt as if I was being
slightly pushed upwards by a cushion of psi underneath.

After a few seconds, I realized that I couldn't keep focused on the pull against gravity anymore. Almost at the same moment, I heard my sister coughing (without being sick or anything) next door.

I paused the practice, thought that it couldn't have been me and restarted focusing on the pull. Then I heard my neighbour coughing (she's healthy aswell). Ok, I stopped the practice again. When I tried it the third time, I noticed that muscles on my hand were twitching. I didn't care, I just practiced for a few seconds longer and muscles on my neck started twitching.

It ocurred to me that this probably means that I'm too tired or something. When I stopped practicing, the twitching immediately went away. Went to bed late and couldn't sleep much (I constantly found myself trying to solve some mathematical problems in the dreams).

Note: See post "Suffocaton".