I'm a bit of a mimic. Used to love to watch Rich Little as a kid imitating the "stars".
And it seems to run in the family. One of my cousins went to London for 6 months and I honestly couldn't understand her when she came back - think she was not staying in a posh area.
And of course despite the fact my dad's family has been here for 160 years, they grew up in an area predominately populated by ex Scots, and they retained a little accent. So I have been known to put on an accent for fun, or worse unintentionally. My french accent btw also gets me in trouble - I have no problem with the accent, so people assume I speak and understand much better than I can.
At one point in university I went to a costume ball with a young lady (a Fraser) whose ancestry was also scottish and I wore a kilt. There happened to be pipers there and I put on the accent had them fooled for 5 minutes before I fessed up.
Seque on a few years and I'm at a house party. In come a couple of young fellows who were almost fresh off the boat.They had some beers, and I had some. I somehow slipped accidentally into their accent. They thought I was making fun of them and/or scotland. I came very close to taking a beating, both fellows were more fit than me, and despite the fact that they had consumed more alchol, they were also just plain angry. Cooler heads calmed them down and I left quickly.
So I can picture your college hijinks....
James