Irfan Pathan triggered a stunning Bangladesh collapse to leave India on the verge of an innings victory in the second Test for a 2-0 sweep of the series on Sunday.
Mohammad Ashraful struck a heroic national record 158 not out to bolster Bangladesh's first innings to 333 all out at tea on day three, falling eight runs short of the follow on target in reply to India's 540 all out.
Forced to follow on, left-arm Pathan then grabbed the first five wickets to reduce Bangladesh to 118 for nine, still 89 runs away from India's first innings total.
The 20-year-old Pathan returned figures of five for 32, his third five-wicket innings haul in a match.
At one stage, he had taken seven of the eight wickets to fall, including two of the last three first innings scalps.
Pathan, who took 11 for 96 to be named man of the match in the first Test, again showed his class.