Insects buzz and birds chirp in the humid air beneath the canopies of the Amazon.
Suddenly the tour guide, an expert on rain forest ecology, stutters. The trees go fuzzy. The scene shifts to a slowly spinning circle.
The feel of moisture and smell of soil you were imagining are gone, replaced by fluorescent lights and a hard, cold desk.
Your classmates are distracted. Your teacher is frustrated. Your virtual ecology lesson is over.