Nothing 'nice' about these but rather than start another thread...
The latest video of a Komodo dragon fight for dominance between two 80-90 kg, 3-metre long monsters.
The aim is not to permanently damage the opponent - simply to show him who is the boss (Komodos can shear off a deer or boar's leg or eviscerate them in one bite - they are like land sharks with their devastating dentition - plus the deadly venom of course).
https://www.youtube.com/watch?v=m63vUqtFbEE