Cancer and chemo are making me dumber

Yesterday, at the grocery store, 
a man in front of me
was being a dick 
to the person bagging. 

So behind his back,
to the cashier,
I attempted to make the 'crazy' sign,
where you circle your finger near your temple.

But instead, 
I made the blow job sign,
where you move your fist 
in front of your mouth. 

The cashier looked real confused,
and I left without
saying another word,
and without my groceries.