Friends … i have a couple of guys actually waiting to see me flunk again so that they could drag it in all the conversations one way or the other throughout the next year (‘why don’t you give it a try before saying anything about it’ just doesn’t seem to be working with them). I hope / wish i clear L2 this year but any idea for the contingency plan …
why tell them anything?! it’s not their business. Just smile and wink at them and if they persist, tell them that their obsession with you is bordering on the totally gai … 
Ask them the contagno/backwardation question first… Then ask them to get the answer in 30 min. Of course they will not get the answer… and then tell them that you get 1 min 15 sec to answer the same question in the exam… They will shut up forever…
try " hey buddy - have you ever picked up your teeth with broken fingers ??" that’s been working for me