I soloed a tank in Blood Harvest once. It was one of the two tanks that attacks during the finale. My other teammates left the game, so I was stuck with three AI that were stuck against a door in the house.
Long story short, the tank chased me all around the crop field as I backpedaled behind everything and unloaded all of my shotgun shells on the fucker.
Then I died as I was running into the military tank at the very end