Farhan Akhtar gave everyone on the sets of Kartik Calling Kartik a good scare when he pretended to collapse. The scene required him to have a telephone wire coiled around his neck. So, when director Vijay Lalwani put a little pressure while tying it around his neck, Farhan collapsed. He was given a pillow to cushion his head, his hands were massaged to boost blood circulation and he was given water. They even called for an ambulance when Farhan owned up to the prank.
Vijay was horrified when Farhan collapsed. He was shaken up and tried calling producer Ritesh Sidhwani. Luckily, Farhan gave up the prank after 10 minutes. It was apparently planned between Farhan and cinematographer Sano Varghese.