YOU SAID:
I am dumber than denki kaminari
INTO JAPANESE
私は電気雷よりも愚かです
BACK INTO ENGLISH
I am stupid than electric lightning
INTO JAPANESE
電光よりバカ
BACK INTO ENGLISH
Stupid than lightning
INTO JAPANESE
稲妻よりも愚かな
BACK INTO ENGLISH
Stupid than lightning
You've done this before, haven't you.