I was working in the garage when what I thought was a yellow jacket darted in front of me. My first move was to step calmly from the garage to let the insect get out, but it didn’t get out. It hovered midair, turning to keep its eyes locked on me. Hm. That is not yellow jacket behavior. So I circled it, and watched it pivot to continue to face me, round and round. My phone camera wouldn’t focus on the (relatively) small body, and I wasn’t moving closer without ID. It finally ran out of energy and settled down briefly. iNaturalist told me it was a Giant Flower Fly, and another user further classified it as a Virginia Giant. It uses its coloration to capitalize on the fear inspired by yellow jackets. It also does quite an effective job at intimidation with the bold stare and mid-flight menace. Eventually it left the area; I can assure you that there are no delectable flowers in the garage, so it was best that it moved on. But at least I don’t have to search the garage for a nest.