John Kavanagh explains why Conor McGregor put hands behind his back during Eddie Alvarez fight

Most people watching the UFC 205 main event figured Conor McGregor was putting his hands behind his back against Eddie Alvarez as part of his showmanship. It appeared that McGregor was almost daring Alvarez to take a swing at him.
There might have been an element of that in the historic fight. But that doesn't the primary reason why McGregor did it, according to his coach John Kavanagh.
Kavanagh told Ariel Helwani on a recent episode of The MMA Hour that McGregor was actually clasping his hands