Please advise me about the underlined below.

The lines in a scene of movie, "The schoo of rock"
This is a series actions for that A teacher tries to cheer up his student while using their hands. then I can't understand what the underlined mean.
Please advise me.
Q1. Boom. ?
Q2. platform is http://endic.naver.com/enkrEntry.nhn?entryId=c19c081d85104dcdb536a58e70fc746f
Q3 Kaboot it.?
Q4.work on=Do something
Q5.
It's a long shake??. Get going (= begin), right?
Q6. Good knuckle crack.?

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Boom. Boom, a couple of these.
Now, here.
Now give me a platform.
Let's rock, let's rock today.
Now do it to me.
- Let's rock, let's rock today.
- That's good.
Slap it.
Shoot it.
 - Kaboot it.
We'll work on that later.
It's a long shake. Get going.
Good knuckle crack.
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