Suddenly reminded of a Google+ incident from years ago. I was on the Google main MTV campus and had a meeting that happened to be scheduled in a meeting room at the back of the main Google+ development area, in a building separate from the main four buildings. There was pretty serious security around Google+ at that point, I had to get special approval for access and pick up a second smaller badge in addition to my regular campus badge to access the elevator to take me up, and to enter the development area itself.
Notably, within about 10 seconds of entering, I was hit in the head with a large foam ball.
This may have been a harbinger of how Google+ would eventually meet its demise, but at the time I was not perceptive enough to realize this.