Actor Pavail Gulati said his 'Goodbye' co-stars Neena Gupta and Rashmika Mandanna are "a riot on set". Calling Neena "a fireball of energy", Pavail said he's honoured to be working with a "wonderful talent" like her. He also called her a "wonderful human being". 'Goodbye', directed by Vikas Bahl, marks Rashmika's Bollywood debut.