Shakib was leading Bangladesh in a high-stakes match against Sri Lanka in the tri-nation series, the Nidahas Trophy.
In the last over, Bangladesh needed 12 runs to win, with Mahmudullah the only recognized batsman in the middle.
On the second ball of the final over, fast bowler Isuru Udana bowled a bouncer, his second of the over, that was above shoulder height.
According to the rules, Bangladesh should have been given a no-ball, but the square-leg umpire did not agree.
Enraged by this decision, Shakib came to the boundary rope and signaled his batsmen to return to the dugout, which would mean losing to Bangladesh.
In the end, common sense won out, Bangladesh continued the chase and Mahmudullah sealed a memorable win for the Tigers.