Damn, I wish you had the camera. !
I recently watched a Nat. Geo. channel special where they documented the Eastern expansion of the coyote. They interbred w wolves in Ontario Canada and this created a bigger, meaner critter that now hunts in packs.
A young country singer was killed by coyotes while hiking. Unfortunately, she ran from them which activated the predator/prey response. They were fearless, and one male refused to abandon her body as three male teenagers tried to drive him off.
Im not sure but I believe the coyote has the distinction to have attacked man in every state in the US. I've never heard of one being 100 lbs - usually that wolf territory who thankfully, leave us off the menu.