"Ha! Are you looking to fight me fatty?"
RAAARRRRRHHHHHHRRRRRRR
A frost dragon swoops down and freeze-shouts at the mammoth. I can't see that well, since it is now pretty dark. As the dragon lands, a Giant comes and plummels at it, also missing me by inches. It gets pretty intense, with a lot of forst on my screen, Lydia screaming of pain, a mammoth stomping on the ground from anger, and finally, a DEAD DRAGON

The mammoth walks away, i quickly dispatch the Giant, and a dead Lydia lies next to the giant fire...
Most epic dragom fight EVER.
(for now, at least. I have only killed 3 dragons)
What about you guys? Describe your mos epic random dragon fight yet