YOU SAID:
I can't believe you would do something as crazy as that
INTO JAPANESE
私はあなたがそのような狂ったことをするとは思わない
BACK INTO ENGLISH
I don't think you would do such crazy things
INTO JAPANESE
私はあなたがそのようなクレイジーなことをするとは思わない
BACK INTO ENGLISH
I don't think you would do such crazy things
You've done this before, haven't you.