Kapil Dev was the first Indian to hit 4 consequtive sixes in tests when he hit them to avoid the follow-on against England. Dhoni didn’t hit 4 but he did hit 3 sixes in 3 balls back in 2006 in a test match against west Indies in 2006. Brian Lara, the West Indies captain at that time didn’t had any clue on Dhoni’s batting. Dave Mohammad was the bowler.
Watch hat-trick sixes by Dhoni below: