Everyone with dogs needs to know how to do this.

Everyone with dogs needs to know how to do this, JUST IN CASE.  I have used the lease method on large dogs and I was able to manage it by myself.  You don't actually need a fancy leash - a regular one will do the trick.  Just loop the clippy end through the handle, then you can clip it anywhere or slam it in a door.  Bonus there is that it will tighten on them if they continue to pull.