No Chess Grandmaster is normal; they only differ in the extent of their madness.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown640"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "1kr5/pp3ppp/B1b1p3/8/3P4/1QR3P1/PP1q1P1P/1KR5 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Be4+ 2. Ka1 ( { White can try: } 2. R3c2 Rxc2 3. Rxc2 Qd1# ) ( 2. Qc2 Rxc3 3. bxc3 Bxc2+ 4. Rxc2 Qe1+ 5. Rc1 Qxf2 6. Bd3 Qxh2 { Black wins with a large
material advantage. } ) 2... Qxc1+ 3. Rxc1 Rxc1# 0-1