Humming bird and House Finch

Homer and I make a habit out of sitting on the kitchen porch watching the birds at the feeders. we also have 2 humming bird feeders. The other morning we we at our usual chairs when all of a sudden this tiny little humming bird is chasing a house finch female this went on for several minutes, as the chase went from one limb to the other with this tiny mad as a hornet humming bird ruled the roost over the bigger bird.  We had never seen this behavior before, two people now has a education of humming bird mad...what a treat to watch but I'm sure what ever the house finch did it will not happen again.