In Danish, 'lad være' means 'stop it', but 'hold vejr' means 'hold your breath'.
være and vejr are pronounced the same way when saying it.
So back in kindergarten, I remember that there was someone who used to say 'hold vejr' instead of 'lad være'. Every time someone teased her she'd say 'hold vejr', then the one teasing her hold its breath in front of her, which she found to be teasing, so she said 'hold vejr'.