Slow and Low full tosses has been proven to be a good ball in the death overs of T20, since it's difficult to hit low full tosses.
In the final over, it's really reading the mind, what the batsman is expecting... So I think he read it well to give something unexpected and that was effective.
I'm with Shahbag for fair punishment of all war criminals. Im with Shahbag to stand for fair trials of all Corruption, all murders and social injustices occurred over last 40 years. I'm for a secular, corruption free & Just society in Bangladesh. Spirit of '71