A technically unsatisfactory sequence showing a hornet hunting hoverflies on a warm summer day. Hålanda, 10 August 2014. Camera: XH-A1, sound: Telinga Pro 5.
Here I surely sensed the lack of a high-speed camera... but I hope that the sequence conveys some impression of the panic that the predator created.
Note that hornets are very friendly creatures (to us, that is) and should be protected, not exterminated.