YOU SAID:
When I saw him at the first blink I got butterflies in my stomach
INTO JAPANESE
最初のまばたきで彼を見たとき、おなかの中に蝶が来ました
BACK INTO ENGLISH
When I saw him in the first blink, a butterfly came in my stomach
INTO JAPANESE
最初のまばたきで彼を見たとき、蝶が私の胃に来ました
BACK INTO ENGLISH
The butterfly came to my stomach when I saw him in the first blink
INTO JAPANESE
最初のまばたきで彼を見たとき、蝶は私の胃に来ました
BACK INTO ENGLISH
The butterfly came to my stomach when I saw him in the first blink
That didn't even make that much sense in English.