Robber Flies are air hunters, and are also known as Assassin Fly and Bee Killer. They have strong legs which can catch prey in flight, even prey much larger than they are. They are active predators on flying insects, and unselective in prey species. It's basically the Great White Shark of the insect world.
An Orb Weaving Spider that has captured and wrapped a bee in a web cocoon for later consumption, adds a little more web to the cocoon, and then while sucking the fluids out of the victim, another bee runs straight into the web and gets caught, but after a few moments of struggling, it manages to break free to live another day. Ventura, California, USA.