"Do you have any distant relatives going by the name of Longbottom?  Not that you should bother with it any longer now since you shall soon loose all contact with reality never to come back!

Now, tell me: which is scarier? Dying knowing you didn’t succeed or dying knowing you're as incompetent as Neville Longbottom? "

(I may regret saying this but,
if you find the right bottle,
it will counteract the poison. 
So go fetch it for all I care!)