The name Betelgeuse refers to the mischievous ghost popularised by the Beetlejuice films, and saying his name is famously part of how he is summoned in the story. This short Hallo Betelgeuse clip borrows that idea for internet humour, turning a simple greeting into a summoning joke. It circulates on soundboards as a quick reaction audio, shared in chats, streams and short edits where someone wants a playful, slightly spooky entrance without using a longer movie quote or an explained reference in the video itself.