It might all have been the intensity of the performance.Seriously, this can happen.
Many years ago I did a gig with a band I’d been in, got asked to stand in. After the gig a guy I knew asked what I was on as my performance was apparently quite good. Nothing, other than a few pints of lager, I was just chuffed to be doing a gig again and put my all into it.
All that said tho, I reckon MK was like Tony Montana in Scarface, head in a pile of it.