He said the bear charged at him repeatedly — even after he used his bear spray.
The biologist said making it back to his truck was like taking part in a 45-minute dance.
"We were like two feet away [from each other]," Foster described. "He'd stick his head out one side of the jack pine and I'd threaten to spray and he'd stick his head on the other side of the tree. It was almost comical, if the stakes hadn't been so high."
Foster, who has been working in the bush for more than 30 said he's "never sprayed a bear before."
"I've run into ... Grizzlies out west and black bears here, but never in a predatory attack."