The truck just likes tapping it's foot to the rhythm.
Went out for a bit today and on the way back I came to a 4 way stop sign. The problem is that the person in front of me, and the person across from them were both making left turns and nether had on a turn signal. It took them a full minute to move, then they discovered that the other also moved and this concerned them both because they were making left turns. After they both moved a bit and stopped a few more times, one of them turned on their signal to announce what they were doing to the other, then the other also signaled. Good thing there wasn't anyone else at the intersection, they would have just went and left them there confused.
I really need a dash camera.