In fact, it only happens once a year. It's the annual collect for the Salvation Army!
Volunteer firemen drive the trucks around town with the sirens blaring as people walk along and pick up the parcels that have been left by the mailboxes letterboxes. As we watched this truck go by, we actually saw cars slow down and hand bags of goods out their car window to the runners.
It kinda brings a little tear to your eye to see the smiles on the runners faces as they jog by.