Ranbir Kapoor and Anushka Sharma's off-screen friendship faced a test during 'Ae Dil Hai Mushkil' filming when a scene requiring a slap went awry. Anushka, immersed in the scene, repeatedly slapped Ranbir for real, leading to his visible frustration. Despite the on-set tension and Ranbir's annoyance, Anushka apologized, explaining she got carried away.