Just amazing stories. Makes me want to witness one even more. I love bees. I think they are fascinating.When it happened at our house we were all outside for some reason or other (husband, housemate and I,) when all the sudden there were tons of insects everywhere. All kinds of bugs of every kind, then we heard the buzzing and saw bees and more bees until the whole middle of the tree was covered. I guess they drove everyone else out at least temporarily. We just stood there at watched stunned. Took 15-20 min. They moved into the hollow and lived there until the tree broke years later.