How do you make it clear you are no longer using a piece of equipment when asked?

Here's my example: You're all fired up for gym, take bit extra pre workout, start blasting out sets, as you move to another exercise a gym comrade points at the equipment you were using and says 'something' the gym music is pumping nearly as fast as the blood in your ears making it impossible to make out what he said, shaking your head may be taken to mean 'no you can't use it, i'm still using it' nodding your head could mean 'yes I'm still using it', it's a minefield! My go to method is staggering away from the equipment muttering 'aaaaagh', effective if a bit dramatic. I realise this probably belongs in Moronic Monday but I was hoping to get a few responses to see the average.

submitted by /u/Neko-gao
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