Bollywood filmmaker Karan Johar, who is known for his wit and self-deprecating humour, recently took to Twitter and shared a message for the people who troll B-Town celebs. He wrote, "My dear Twitter Troll....there is a new product in the market...it's called a LIFE... please get one!! offer is open till stocks last!!!" Few months back, the 'Ae Dil Hai Mushkil' director was trolled for his sexual orientation. Watch video to know more.