You pack up your carry-on bag and show up at the airport. As you go through the security line you have to unpack everything. All liquids and gels have to be placed on one conveyer belt. Electronic devices are placed on another. Your belt, shoes, hat, jacket, are placed on another. Whatever remains is placed on yet another. If you accidentally put something on the wrong conveyer then you and all your belongings are dragged off to a private room by 3 goons who go through everything with a fine toothed comb, taking so long that you'll undoubtedly miss your flight. Each of those conveyers goes through an assortment of various gizmos that poke, prod, scan, irradiate, zap, spray, and shake all of your possessions.
If you sort all your belongings properly then you then proceed to one kiosk where you have your retinas and/or fingerprints scanned. Depending on the outcome of that (and probably the whim of a nearby screener) you're shunted to another line where your clothes are swabbed down and tested for lord-knows-what sorts of chemicals. Then it's off to another line to proceed through a nude-o-scope so the screeners can gawk at you. And since the nude-o-scope doesn't actually do what it's purported to do then you're also subjected to a full pat-down. After the final pat down you're interrogated by yet another agent who demands to know where you're traveling, who you're traveling with, why you think you should be allowed on board an airplane, etc.
After about 30 minutes of "processing" you're allowed to retrieve roughly 85% of your belongings (half of which are damaged or completely destroyed from the "screening" process) from a huge bin where all those conveyers dump everything into one huge pile.
Oh yeah, and if you're not smiling sincerely throughout the entire process then you're also subjected to a full body cavity search and then ejected from the airport no matter what the outcome of the search.