Twelve years ago, at the inaugural ICC World Twenty20 in South Africa, England pacer Stuart Broad bore the brunt of Yuvraj's fury, when the Indian left-handed batsman hit six sixes in an over to race to a 12-ball half-century, which is still the fastest in the shortest format.

from Times of India https://timesofindia.indiatimes.com/sports/cricket/news/this-day-that-year-when-yuvraj-singh-hit-six-sixes-in-an-over/articleshow/71196232.cms