レムネ Ramune
ピンポンピンポーン Pinponpinpooon.
The first term, ラムネ、I thought it was just a name for a very delicious japanese soda. Or maybe, I thought, it wasn't Japanese since the name was in カタカナ. But さとうせんせい enlightened me to the fact that ラムネis a perpetuation of the word Lemonade, Lemonade eventually became Ramune or ラムネ。 Which is funny, because I think the soda tastes like bubblegum.
As for ピンポーン、I used to read a lot of manga and I remember not understanding what the little leftover symbols were for. Now I see that they're little onomatopoeias, kind of like KA-POW in American comics. In this case the ピンポンピンポーンwas the sound of a doorbell repetitively ringing.