Reuniting for the first time in a while, the members exchanged playful jokes and were full of laughter together. However, when it came to rehearsal time, Taeyang, Daesung, Seungri, and G-Dragon got to work with professionalism. 

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During the rehearsal for "FXXK It", the staff and Big Bang members came to a halt as they ran into an issue; they still were not able to figure out what to do during T.O.P's rap part. A staff member asked, "What are we going to do here?" 

Everyone stood cluelessly until the staff playfully suggested that Seungri take charge of the rap. 

The maknae didn't hesitate and started showing off his beatboxing skills. Fellow members attempted to help Seungri, giving advice on how to fill in for the spot. 

Watch Big Bang in rehearsal in the clip above.