I feel like that laugh of trio was real laugh not acting😅 I saw this scene when i was 9 or 10 with my big sis n her friends. They were laughing like crazy. At that time i didn't totally got the scene. I thought his underwear was showing 😆
I kinda figured out the trick. Look at the way he partially duck with one foot sticking out. He must be inspired by one of the Friends episode - Phoebe's friend, Robert by exposing something'tasty' (testi...)