Guest Visitor to the Lecture

Maybe it was the rain over the weekend, or maybe it's just the season, but we've got a guy crashing our lecture this morning:

A close-up:

And man was it huge! It was about the size of my palm... estimate only, since I was not that enthusiastic in conducting a comparison in close range, lest it decided to inflate my hand.

Luckily, it was satisfied with its poor vantage point of the lecturer and the screen for the entire day.