"I went to the beach but there was no one over there"
"Dickie, come down here!"
"It's more comfortable up here"
I come across such sentences in movies and TV. What do they actually mean? Wasn't it enough to say "I went to the beach but there was no one there". Why did they have to put the over? Or does it mean something slightly different?
About the up and down , I have come to the decision that it has something to do with stairs. That is , say you live in a multi-storied building and you're on the top floor. If you want to ask someone from a lower floor to come to yours , you'll say "come up to my room" because he/she will have to go up the stairs. Same goes for "Come down here", going down the stairs. This is what I believe.Tell me if wrong.
But I've not yet succeeded in making something out of the over. Please discuss.Explanations with examples will certainly help the most. Thank you.