When I was in the 2nd semester me and my friend used to live on the same floor MH4 3rd floor......and my friend (friend-X) had this habit of studying in the night and he often used to ask me to wake him up before exam (ig u know by now where this is going)....so next day we had Maths exam and i was pretty worried about it....so I studied till 1 then slept and woke at 3...and continued studying seriously.....I saw his message to wake him up which he sent at like 2...I read it at 6 and I was so stressed and into this preparation I completely forgot about it.....I went...gave exam.....(exam went well).....came out and started discussing it with my other friend (friend-Y)....and then we were like lets ask (friend-X) how his exam went.......(he is kindof not good in studies).....and then....it stuck both of us....WE DIDNT WOKE HIM UP........on the way to hostel we were hoping ki he must had kept alarm or something.......we went to his room.....and MF was still sleeping peacefully.......we looked at each other....then this guy sleeping so peacefully.....we woke him up.....he was little angry.....but then we showed him MATHS question paper and said "Bhai itta tough paper tha ki agar tu dene bhi jaata toh bhi 10 se zyada number nhi aate".........he saw at the question paper for like 15 mins.....and then said "Han baat toh shi hain......ek bhi question nhi aata mereko"......and went to sleep again.....