I got trapped behind another invisible wall
In Hollis' Hot Streak, in the Pharmacy area: not sure how I did this one but I somehow jumped through or fell through the invisible wall on the left side of the gallery. I only realized I was in trouble when I fell through the floor over there. Managed to jump my way out of that but then discovered I was behind an invisible wall. The hunt for figments takes us to places both strange and ... y'know ... buggy.
I've really got to stop doing that.