I can't think of an actual idiom, but here are a couple of suggestions as to what you could say: This could be you, you know. You might be next. It won't be so funny when it happens to you.
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hrsaneiWhen somebody is teasing or humilating you because you are in trouble or you have made an embarrasing blunder and you want to use an idiom telling him/her that don't tease me it might happen to you one day.I can't judge from your description exactly how appropriate each might be, but here are a couple of possibilities.