Was driving home from work one summer day a few years back, windows open, and heard a distinct multi-engine heavy prop plane drone. Thought it was probably one of the slurry planes headed north to drop on one of several wildfires that season. Picked it out flying parallel to me a bit ahead. Thought it looked familiar, and it didn't seem to be in the usual white and orange. It cut a 90 degree turn, and that distinctive tail removed all doubt.