Left4Dead2 Visuals Multihack

Hi, I would like to ask how LagExploit works and how to use it, and how the Smoker glitch works? Once, I managed to catch a player with the tongue and drag him across the entire map, but it only happened once, and since then, nothing, so I don’t know how it works properly. So, I would need an explanation of the Smoker glitch, LagExploit, and Hunter glitch. Thank you.