Theo was driving Diego-san absolutely bonkers last night, continually chasing him all over the house until a pointed hiss put a temporary stop to the madness.
When I got home there were some construction trucks (and people) working on the street in front of my house. I had noticed signs put up the day before telling people not to park on the street. I'm guessing the construction work went on all day and might have been kinda noisy and house shakin'.
This might have been a reason for Theo's extra energy.