I have very similar experiences, mostly in feverish dreams, but they give me such a bizarre feeling that I thought they were unique to me.
When I had mono, there were two hallucinations I remember best. One was a friend calling my name (he was three states away) over and over again at different volumes. Another was a picnic table that wouldn’t get out of my way. I kept trying to get around it but it would move to block my path. The scariest part was that the table was actually there, so I’d really bump into it each time I tried to walk away from it.