YOU SAID:
how could this be? i'd never belive it
INTO JAPANESE
これはどうやってできるの?信じられない
BACK INTO ENGLISH
how can i do this can't believe it
INTO JAPANESE
信じられない
BACK INTO ENGLISH
can't believe it
INTO JAPANESE
信じられない
BACK INTO ENGLISH
can't believe it
You've done this before, haven't you.