- He was a retired railroad engineer. He taught Brad Pitt how to fly-fish for the movie A River Runs Through It (1992). He also taught fly-fishing and fly-tying to his fellow residents, and to the staff members, of his retirement community. He grew up near the Maclean family in Missoula, Montana. His family's cabin was built next door to the Maclean family cabin in Seeley Lake, Montana. He had learned to fly-fish and tie flies from Rev. John Maclean, and he had considered Paul Maclean to be his best friend. The friendship between the Maclean and Croonenberghs families continues to this day, into its fourth generation.
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