Unimpressed Rory McIlroy throws fan's remote-control golf ball into lake

McIlroy is five shots off the lead at the BMW Championship.  

CHASING: Rory McIlroy hits on the 12th hole during the third round of the BMW Championship golf tournament at Wilmington Country Club.

Rory McIlroy was involved in a weird incident at the BMW Championship yesterday. 

Trying to get his faltering challenge back on track, the Irishman witnessed a fan-controlled remote-control ball moving around the 15th green at Wilmington Country Club.