Scottish to Irish
When I worked in the motor trade my desk used to be located right next to the parts call centre so I got quite used to the constant ringing of phones and the shouting and moaning from the 15 guys that worked in there. Most of the blokes were quite old and came to work to do their job and that was it. There were one or two, however, that were in their twenties and spent a great deal of their time eating burgers, talking shit and pissing off customers on the phone.

They did a lot of things which I didn’t find particularly funny but one guy used to do something that cracked me up. His name was Nick and he was very good at accents. His trick was to pick up the phone and speak with a thick Scottish accent and then gradually move into an Irish accent, he used to do it so skilfully that the customer would rarely notice the change. By the end of the call the transformation would be complete and the customer would sound quite confused but would usually not be able to pinpoint exactly why.
(Flim-Flam the Magnificent "You is talking loco and I like it!", Wed 9 Sep 2009, 11:13, Reply)