The lefthander hit the first delivery from England bowler Stuart Broad out of the Kingsmead stadium, and followed with five more sixes in the Super Eight match of the World Twenty20 tournament.
Yuvraj also scored the fastest 50 in this form of the game - off just 12 balls.
He was dismissed for 58 off 16 balls.
The discovery of the submarine has unveiled a few "inconsistencies." For example, how can one explain the fact that the sub was found where it needed to be searched for from the start?