These critters keep showing up in our house. I think it's a first in our forty-plus years. They are huge but non-aggressive--though John did get stung when he picked up one he thought was dead.
They are either crawling on the floor--at which point I toss a heavy folded dish towel over them and transport them outside--or zooming around overhead.
Evidently they look for cicadas to paralyze to provide food for their own young. Maybe they're desperate due to a lack of cicadas--I saw only one this year.
More about these critters HERE.