Unstucking Ropes

Since I'm gearing up for a climbing trip to Skaha soon, I thought I'd make this week's theme a climbing one. First up: how to not get stuck ropes. Or, if, you get them stuck, how to unstick them. Just for the record, I think the name "European Death Knot" is an humourous & endearing moniker that displays the climbing communities humour & good will. Don't you?