The next sentence: El autobús sale a las once.
The hotel has an electric bus, and autobús simply stays autobús (el autobús). It pulls up in front of the hall over there, and because it is running late there are Lego bricks ready so people have something to talk about.
When it arrives the driver is eating an apple, there are lassos lying on the seats (sale a las), and right at the back sits your uncle looking at his toes (once).