Doug Gottlieb went full Bobby Knight Thursday night after his University of Wisconsin-Green Bay squad blew an 11-point lead in the fourth quarter … tossing a chair as he made his way to the locker room.

Cameras in the arena caught the second-year head coach losing his cool in reaction to Robert Morris erasing a double-digit Phoenix lead in the final three minutes of play with a game-winning layup with 2.4 left on the clock.

Gottlieb disappeared behind the bleachers as he left … only for a chair to come flying into view and smack against the wall.

Charlie Sheen‘s ex-wife Brooke Mueller is banging down his door, ready to collect on the huge bill — about $15 million — she claims he owes her for unpaid child support.

Brooke informed an L.A. County judge she wants Charlie to cough up the money ASAP. In docs filed Thursday, and obtained by TMZ, she says the ex “Two and a Half Men” star owes her $8,967,600 in child support plus another $6,418,643 in accrued interest.

And, the kicker … mama wants it paid in full in 30 days!

Brooke explains Charlie was ordered to pay her $55,000 per month in child support in April 2010, and there were no issues until July 2011 … when he started sending either partial payments or failed to make any payments at all. So, she wants the court to make him pay what she’s rightfully owed, plus $25,000 in attorney fees and costs.

Charlie and Brooke were married between 2008 and 2011 and share 16-year-old twin sons.

TMZ has reached out to Charlie’s attorney for comment … so far, no word back.

Netflix is going to buy Warner Bros. … and they are dropping an insane amount of cash in a move that most believe will reshape the entertainment industry.

News broke Friday morning that Netflix agreed to purchase Warner Bros Discovery’s TV, film studios and streaming division for $82.7 billion — an equity value of $72 billion — in a freaking cash and stock deal!

As you know … WB had a for sale sign out for a few weeks … and a bidding war was underway, which included Paramount Skydance, along with the winner, Netflix.