After my opponent made a move,he get up and walk around the tournament hall.

Unless he went left.

Why should he stay while you think? The time is running on your clock!

DENVER

That's fine. It's OK for him to get up and walk around. But you're under no obligation to let him know you've moved. If he gets up to wander, and you move immediately, let him find out about that when he gets back.

It's perfectly good.  Back when I played OTB tournament chess and my opponent was taking a long time moving, I would (go get coffee) and then stand behind him looking at the board, to see what he was seeing from his perspective in the event I could gain any new insights into the position that way, and several times a year, I did.  

It's fine.  In fact as oregonpatzer mentioned, sometimes it helps to get and walk around to your opponent's side of the board and look at the game from his side.

Can you do some random disco moves?

lol preferably not... I wonder if you can get disqualified for being a distraction like that. Can you do some disco moves or are there consequences a rule book or something?

Yes I would find many movements super distracting so there is a serious question hiding amongst my banter

This is normal, you can walk around the tournament hall when it's not your turn (or even when it is your turn). But no, you can't do "random disco moves." You're not allowed to intentionally distract your opponent or others.

Now that you mention it, maybe a video on tournament etiquette is a good new idea for my chess site (chesspathways.com) - there's a lot that people mess up, particularly when it comes to offering draws!

Very good thanks very much. I'd be crap in chess tourneys have some weird autism with noise especially. Unless I took heaps of valerian or something which might work. Unless they drug test then I'd be up Schitt Creek.

Yeup heaps of dodgy things like that would break me down very easily. TG for online chess.

Great that you are impervious to head games : ) You actually have the steadiest stats I've ever seen lol

Yeah, as others have mentioned, it is ok to do that.  Some reasons/benefits may include:

Needing to refill coffee/water or getting a snack

Needing to use the restroom

Looking at the board from your opponent's perspective

Looking at how other games are going (or their results if completed) to see if you need to fight for a win or if a draw would be sufficient for winning prizes

Stretching - sitting in one place and staring at a board for hours can stiffen your muscles

Give your eyes some different (more relaxing) distances to focus on, reducing eye strain

Give your mind a rest from focusing on the game, so that you can come back to the game fresh - it might help you see something that you were missing before

It can even be a little bit of a psychological ploy to make them use up a little extra time thinking or make a move too quickly in an attempt to make you lose some extra time

I'd like to see a video on random disco moves. 

Doesn't matter.  Break his kneecaps.  He needs to learn respect. 

Just the 2 second snip from Saturday night live, with John Travolta : D

Thanks for the compliment on chesspathways.com!

I'm hoping it's able to help a lot of players. Was the "Move by Move Guide to Chess Thinking" helpful to you as well?

thats his own choice,anyway

Since having an afternoon stroll, going out for a smoke or having lunch in the middle of a game are normal I would reach the conclusion that slowpoke tournaments are too lethargic.

Check this at 3:15

I've played in several USCF OTB tournaments and I've noticed a lot too; what are some of your "worst" observed cases of etiquette? More interestingly, how would you offer a draw correctly and how "messed up" have some observed "draw offer stories" been? I've seen a few odd cases myself.