To ask a driver to stop you need to press the bell closest to you. The sign "STOPPING" is lit up.
I've just realised STOPPING is an onomatopoeia.
The definition of onomatopoeia is:
"the formation of a word, as cuckoo or boom, by imitation of a sound made by or associated with its referent." Dictionary.comThe word "STOPPING" has two words: STOP and PING. This means you are literally asking the driver to STOP with a PING.
How cool is that!
I love buses!