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 "Unknown533"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "1r3k2/p4bp1/2pp1n2/4p3/4P3/2P1BQ1P/qPK2P2/1R4R1 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Rxb2+ 2. Rxb2 Bb3+ 3. Kc1 Qa1+ 4. Rb1 ( { White can try: } 4. Kd2 Qxb2+ 5. Ke1 Qb1+ 6. Kd2 Qxg1 { Black wins with a large material advantage. } ) 4... Qxc3# 0-1