The context of the following conversation is Casey was with her friends and was trying to impress them, so she tossed her drink back.:
Casey says I always wonder if my friends like me..
The friend responds I am sure they do because you are such a kind person..
Casey responds Sometimes though i feel like I have to impress them..
The friend responds How do you do that?.
Casey responds Well at the party we had some drinks and I did a little trick tossing the drink behind me after I drank just to show them I was cool too..
The friend responds You are cool. I'm sure they thought that even without the drink tricks.