Random student: *watching commercial at school about children in poverty in Africa*: Oh, those poor kids! I just want to hug them and kiss them and tell them *sniff* they're going to be okay! Oh, I'm sorry *sniff*... can I get some water?

Me, whispering: Ugh, we get it, you feel sorry for them, you melodramatic you-know-what. ...Maybe not.

http://www.urbandictionary.com/define.php?term=melodramatic

This is in example of how someone or something can become melodramatic. In this situation the student is highly emotional over the commercial, this is seen by the crying and when at the end the student says can I get some water. Watching the commercial shouldn't be making the student thirsty.