Hello all! After much research i have found the answer on how MAS SELAMAT the JI leader escape jail!

Ok, on the 27th of feb.While Mas Selamat is in jail.The guards were doing their normal routine and blahblahblah.

Out of a sudden,Guard A felt so bored that he needed to play something.So they took out a Board game to play(:
Guard A & Guard B felt that 2player wasnt enough;So, they ask mas selamat to play with them.Of Course precaution have to be taken.Mas Selamat was playing behind the bars.
Even Wondered why no one was injured during his escape?
BECAUSE MAS SELAMAT GOT THIS!!!

this is just my interpretation.haha