Riddle: The bowler takes a hat-trick spread over three overs. Tell how?

Question

It has happened only once so far.

Its answer is very easy.

Answer 1

A test match was going .A bowler took wicket of his last delivery of over ,then other bowler finished his wicket less over.Then the wicket taker bowler took wicket took wicket of his first delivery of the over and it was the last wicket of the inning.so the inning came to end.Then the bowler took wicket of his first delivery of the opposite side 2nd inning.So the bowler took three wickets in three over.