The minor inconveniences of life #1

Why is it that when you have to take a really important call, you're in any of the following places:
a) in a store that plays clubbing music
b) on the street in a crush of people
c) on the street in a crush of people with a convoy of buses rumbling past
d) on the street in a crush of people with a convoy of buses rumbling past and a line of vespas trying to out-gun them
e) on the street in a crush of people with a convoy of buses rumbling past, a line of vespas trying to out-gun them, and the street-cleaning machine very metticulously scrubbing the pavement right outside the phone booth you've ducked into?!