He'll never lie because lying is a bad deed in his eyes. He'll probably be okay though - it seems like he is becoming physically stronger the more people he sends to hell, and he's got quite a count going so far.
Tbf other than seeing it for yourself or some shaman in your relatives/acquaintances most ppl wouldn't believe "i can send ppl to hell"/think he was a chuuni lol
dang i hope granny doesn't get hurt. but if she does one excuse to go on a full rampage