Read the following dialogue between Louis and Zayn.

Louis : Where were you last night? Were you in your room? What were you doing last night? 

Zayn  : Why do you ask?

Louis : I heard a noise coming from your room. Something was moving and bouncing. Were you playing basketball in your bedroom?

Zayn  : No. I was watching tv, as usual. I was reading, eating ramen and watching the football match.

Louis : Then who was making noise?

Zayn  : I guess it was John, your next-door neighbour on the other side. He has a basketball game on Saturday. Maybe he was practising for it. 

Louis : I was going crazy. I was studying for a big test and the noise was really disturbing me.

Zayn  : I understand. Next time you should shout out loud, "Hey, stop that noise!" and maybe the noise will stop.

Louis : Good idea. Well, I was feeling angry, but now I am happy again. Thanks for the advice.

Zayn  : You're welcome. Good luck with your test, by the way.

Which picture can illustrate the word "bouncing"?