Elaine push

Elaine's " Push to the chest" was performed on Jerry a couple of times. Also she did Kramer, And the "Jerry guy" in the Bizzaro episode.

I thought she did it to 2 guys at once? Were there other instances?

http://pages.prodigy.net/pizzabagel/Nothing_Lists.htm

Get Out!

Here's a list of the episodes in which Elaine utters that immortal phrase - usually accompanied by giving someone a two-handed shove to the chest:

Episode Comments "The Apartment" When Jerry informs Elaine that he got her an apartment in his building - the one right above him, whose rent is only $400 a month because it belonged to a 94-year-old woman until she died. (With a two-handed shove to Jerry.) By the way, later in the episode Jerry exclaims "Get out!" to Kramer and gives him a shove when he is informed by the latter that he just found a guy who's willing to pay $10,000 for the apartment. (Thanks, Dan H.) "The Red Dot" When George presents her with the cashmere sweater. Also, just the shove when Jerry presents her with her lost watch. "The Junior Mint" When her ex-boyfriend Roy tells her that he lost weight because she broke up with him - with an alarming shove to his chest as he lies in a hospital bed. "The Soup Nazi" When learning from Kramer that he had gotten her a replacement for the armoire which was stolen from him by the street toughs - with a (two-handed?) shove. "The Bizarro Jerry" When hearing that her friend Kevin got tickets to the Bolshoi. But since he is the Bizarro Jerry, her customary shove is not expected, and she is forced to return to the non-Bizarro world of Jerry and company. "The Nap"

There's a bunch more on the list besides just the "Get out" stuff.