Perspective

When you see a bully for what they really are, you will come to find them embarrassing.
A bully is a weak, insecure person, desperate to feel strong about themselves.
Instead of looking for strength within, they lash out at others and rely upon fear for power.

When you give them humour and pity rather than fear, the bully has no teeth.
If a bully were genuinely strong, they would have nothing to prove. They need you to validate them.