I ordered an Uber taxi last night by mistake. I was waiting at a bus stop after a pint with my mate and I looked at the Uber app out of curiosity. Covered the watch to put it to sleep (what's the word/phrase for doing that?) and thought no more about it. Five minutes later my watch buzzes and there's a taxi pulling up! It took it home and it was only double the bus fare so it all worked out ok, but I'll be more careful in future. Uber only came to my city last month. I was happy to get free chocolate from the driver. I tipped with cash. Do most people tip Uber taxis?