YOU SAID:
I hit a turtle on a bike
INTO JAPANESE
自転車に亀を打つ
BACK INTO ENGLISH
Beat the turtle on a bicycle
INTO JAPANESE
自転車でカメを打つ
BACK INTO ENGLISH
Hit the turtle with a bicycle
INTO JAPANESE
自転車で亀を打つ
BACK INTO ENGLISH
Beat the turtle on a bicycle
INTO JAPANESE
自転車でカメを打つ
BACK INTO ENGLISH
Hit the turtle with a bicycle
INTO JAPANESE
自転車で亀を打つ
it is unlikely that this phrase will ever reach equilibrium