Place it as the punchline after a setup showing Thomas boasting, then follow it with the shocked sound for his reaction and the oh no no no laugh for the group response.
Über diesen Sound
The clip is a very short French spoken line, lasting well under a second, in which a playful altered voice teases Thomas with a childish insult about his size. It lands as cheeky and deliberately embarrassing, the kind of quick jab that makes a group laugh while the named person groans. Its brevity keeps the joke sharp instead of letting it drag on.