Cyclist Uses Airhorn to Scare Pedestrians

Hey, my city has cycle lanes on the streets too, but people don't walk there.
They use the sidewalk, they don't walk on the street !!!
What is this? London? Sure has many retards!

Yup it's London. People walk all over.

In the US there's a company called Air Zounds that makes an air horn attached to a refillable plastic bottle. You pump it up with a bike tire pump (it has a Shrader valve) and get 50-60 blasts from it.
The first day I used it it kept me from getting pushed into oncoming traffic by a bus. Worth every bit of the $19.95 I paid for it.