Hey is a greeting or to get someone's attention.
Hey, how you doing?
HEY! Don't mess with him!
The noise a kids toy makes in stupid adverts to suggest "EXCLAMATION OF EXCITEMENT AND POSSIBLY DISTRESS."
autistic narrator: "Start the new rescue helicopter"
retarded overweight man voicing a lego person "HEY!"
are you this bored to type in hey
i don't need to tell you how to say "hey"
The thing you say when a person falls into LEGO city river
Hey a man has fallen into t he e river of LEGO city