YOU SAID:

but then you go to a party and the bathtub has a crazy big guy inside it and he's going a big dance

INTO JAPANESE

でもパーティーに行くと、バスタブの中にすごく大きな男がいて、大踊りを踊っている

BACK INTO ENGLISH

But then I go to a party and there's a really big guy in the bathtub doing a big dance.

INTO JAPANESE

でも、パーティーに行くと、すごく大きな男がバスタブの中で激しく踊っているんです。

BACK INTO ENGLISH

But when I go to a party, there's a really big guy dancing vigorously in the bathtub.

INTO JAPANESE

でも、パーティーに行くと、すごく大きな男がバスタブで激しく踊っているんです。

BACK INTO ENGLISH

But when I go to a party, there's a really big guy dancing vigorously in the bathtub.