#2 Holding onto the corner rope while tagging in
I don't know if everyone knows this rule, but you need to be holding onto that little white rope in your corner when you're waiting on the apron to be tagged in. It's a weird rule and I have no idea why it exists considering no one ever adheres to it.
I think it's supposed to add to the tension by restricting how much the passive tag team partner can stretch as he waits for a hot tag but it really doesn't add that much to the spectacle and seems to be the relic of a bygone era.
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Regardless, Vince McMahon persists on having it around and no one else seems to care. Sure, you see the superstars hold onto it for the first few minutes but no one really bothers after that and the referees do absolutely nothing to enforce the rule.