I learnt this new trick just last weekend, I picked up this drunk man on Sunday night who turned out to be a lot drunker than I had reckoned, he asked to head fer North Cork and when we arrived the fare was 15Euro, he rooted through all his pockets with coins falling everywhere and eventually came up with 3 Fivers which I accepted.
Obviousely I had the internal car light on when he was getting his money together, but as soon as I was paid I turned the light to Off so even when he opened the door to exit the light stayed off and he could not see all the coins he had dropped, the additional 7.70 in coins made it a nice fare.