tie oneself up in knots []

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或tie oneself in knots使自己紧张；困惑

Even the experts can tie themselves in knots.就连专家也会把自己弄糊涂。
If you probe far and fast enough,you can tie them up in knots.只要你呛得既快又尖，你就能把他弄得瞠目咋舌。