Saw the same thing happen with a water buff bull and a Bell 47 a few years back when I was working in the NT mustering water buff for the TB and brucilosis eradication programme.
Buff hooked horn on chopper's skid, dragged it outta the sky.
Buff was shot, chopper had damaged tail and main rotors, plexiglass bubble was trashed too.
Pilot was OK, but a tad shaken up about the whole thing, guy riding shotgun buttstroked himself in the face on impact with the ground, walked away with a broken nose and two black eyes.
Once it had been established that no one but the chopper and the buffalo were badly hurt, it was a pretty funny scene all up.
Kind of expensive funny scene though.
It did mean a week of sitting around getting drunk while we waited for chopper parts to arrive though
