Most commonly used by people who know they have the high ground, thus smugly leave their hiding place to confront an entire army and get the attention of their archnemesis
Kenobi : *listening to General Grievous, jumps from the ceiling Kenobi: "Hello there."
Grievous: "General Kenobi"
When a Fu*king A$$hole comes behind you and your army without you realizing. And decides to drag your attention by saying "Hello There". After you see him you automatically will say by instinct "General Kenobi"