I'd definitely make a call and get some free ice cream. There shouldn't be metal in your ice cream.
Reminds me of a story... years ago I worked at a pizza place. We get a call about a delivered pizza with a bunch of bolts and screws in it. Everyone thought it was a joke and the manager was leery so he made them bring the pizza in to the store to get a refund. Low and behold, they were right. Something inside the oven broke, a ton of metal fell into the pie, and apparently no one noticed when it was being cut. They got like 5 free pizzas out of it I guess.