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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It is undeniably funny when someone is messing around by the railing or dancing on the joist outcrops and you see a white skull appear. Oops. Been there, done that.