You know what's funny here 0:18 Those 4 oldest hyungs are so energetic and playful, 2 members who are in the middle (in age) looks like a back-up on their hyungs, the 3rd & 2nd maknaes laughing and watching their hyungs, and the maknae is the most calm. SF9 really has the calmest maknae line and loudest hyung line on all kpop groups I stan.