What did the author smoke?

The author didn't smoke anything. But he suspiciously ate a lot of mushrooms at night and dreamed about a lot of mushrooms with eyes.

This was actually my test, which I managed to finish in 4 days. I'm never going to work so fast again. After this experience, my back ached, my stomach (I didn't eat anything) and my nerves. In the end, they seemed to take me, but they told me to do another test. I refused. Tired as a dog.