I remember last year I was in an Uber, and at the destination, I saw the rating question pop up on the drivers phone. His thumb went up and hesitated, and then

I remember last year I was in an Uber, and at the destination, I saw the rating question pop up on the drivers phone. His thumb went up and hesitated, and then he hit 4 stars. I was thinking, I wonder what I've done or vibe I gave out to merit that? I was perfectly polite, I was at the pickup spot, I was very accommodating to where he wanted to drop off. We hadn't had any disagreement, I'd been perfectly pleasant though not talkative. I guessed in the end that an outstanding passenger to him probably gives him an extra tip.