
This happens to me way too often. I usually just respond with sarcasm.

I’ve been drawing it for the last half hour, obviously, I didn’t.
NO I USED MAGIC. Shitty magic.
this happens a lot.
‘To ty sama to narysowałaś? O__o’ 'Nie, z mamą.’
OMG LOL ME TOO. I try not to respond in a mean way.