It's a new one on me. I have never seen this attempted before. Minnesota center Taj Gibson lost a shoe then attempted (but failed) to block a shot with it.
"You can't do that! You can't block a shot with your shoe!"
Taj Gibson really tried it ud83dude02 pic.twitter.com/fodi9Wiycc— SportsCenter (@SportsCenter) December 18, 2018This also happened in the Philippine Basketball Association, and once again, it was merely an attempt. The block failed. But using a foreign object in a live play calls for a technical foul, at least in the PBA.