I was in my house, it was a sunny and warm day. I was in a kitchen with my grandma. Some hornets flied into the room and stung grandma in her hand a few times - a bubble appeared on it and exploded. Then an enormous swarm, hundreds of thousands of hornets flying all around the house. I escorted grandma to safety, took a bug-killer spray and ran back in an attempt to kill them. I ony got to stairs and sprayed few hornets, but bug-killer was ineffective and huge amounts of it was required to kill just a few. I escaped and met rest of my family. They called exterminators and firefighters to get out house hornet-free.