Judging from the data, it looks like the thing is driven to work by someone around 3:30. It continues to tweet. Arrives at 4:00, sort of works for 4 hours but still tweets and checks on occassion. Stops working mostly at 8, is then driven home by someone while it continues to tweet. Arrives at home and then tweets until about 5:30 am, sleeps, wakes up around noon and begins tweeting again.