YOU SAID:
Maybe wearing a helmet just in case there is accident?
INTO JAPANESE
万が一の事故に備えてヘルメットを着用しているのかもしれません。
BACK INTO ENGLISH
You may be wearing a helmet in case of an accident.
INTO JAPANESE
事故に備えてヘルメットを着用している可能性があります。
BACK INTO ENGLISH
You may be wearing a helmet in case of an accident.
That didn't even make that much sense in English.