Hell, you don't even need bear spray.
Just get one of them there empty cans!
Just think how much BETTER those cans would work if they were solid, and lead, and aerodynamic, and ballistically stabilized, and launched by a small charge of chemical propellant!
That would be littering and he sounds like an earth muffin. I read a book about bear attacks and one deadly account was in Glacier NP where a Japanese tourist decided to spray himself all over with bear spray repellent and that night the bear tore into his tent and killed him. Seasoned himself for the bear. True story .