Kajol, while shooting ‘Kuch Kuch Hota Hai’ in 1998, fell off a bicycle and suffered short-term memory loss, remembering only her then-boyfriend Ajay Devgn. Director Karan Johar had to call Ajay to the set immediately. Shah Rukh Khan later confirmed this incident. Thankfully, Kajol soon regained her memory. The film was Karan’s directorial debut and featured a Salman Khan cameo.