Context: After early morning success , I fell into a deep deep pit . I found another " maniac " to play heads up . I got down pretty quick when the guy flopped a straight vs my flopped 2 pair . Big pot ... lost my stack .

Question: Why did the writer lose their stack ?
Options:
0. None of the above choices .
1. Because he was playing with a maniac .
2. Because a straight beats a 2 pair .
3. Because the writer fell into a deep pit .
Answer: 2