I suggest jumping off the tower and killing yourself. Seriously, it shows up in the screen that you died. There's your "shout".
If it doesn't yield results, go to orbit and come back down. Hopefully you get a new instance of the tower and can kill yourself again for notice.
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I was on ps3 & noticed alot of people doing that lol. I jumped a few times myself after taking a good view on the edge for awhile