I once went into a chippy in Biggar and saw some pies in the heated bit above the fryer, when I asked for one the woman took it out and stood back. After a few minutes she rattled the sieve as if she was moving some chips around the fat then all of a sudden my pie was on the counter all wrapped up.
I took it without a thought and set of down the road to the M74. When I reached Abington services I pulled over and opened my pie, sure enough she'd warmed it up in the fryer and the pastry was now soaked in fat.