Actor Nishant Singh Malkani slapped "Guddan...Tumse Na Ho Paega" co-star Rehaan Roy in real while shooting for a sequence of the TV show.The sequence required Nishant to mock-slap Rehaan. But in the spur of the moment, Nishant ended up slapping the actor in real."There are a lot of times, especially during action sequences, where a reel situation turns into a real one. It so happened that while I was to mock slap Rehaan, it turned into a real tight slap. But thankfully we both share a good bond of understanding and friendship and quickly handled the situation," Nishant said in a statement to IANS."The shot was okayed in one go and we both heaved a sigh of relief. I was of course embarrassed, but Reehan put me at ease and as they say, 'All's well that ends well'," he added.The show is aired on Zee TV.