[widebody911]

Piece of cake.

Open carrier and set it on the floor with the door facing upwards.

Grab cat and hold it on the ground.

Wrap your hand around the shoulders/scruff off the neck, and grab as deeply as you can, while pushing (gently but firmly) downward to maximize the amount of skin area.

Grab as hard, getting as much skin as you can. If you do it right, this pulls their front legs away from each other; this is the kitty version of the full-nelson.

Swiftly lift the cat up and thread it into the carrier, hind legs first. Do let let go, do not collect $200 until the cat is in the carrier.

I've used this technique several times over the years with both tame and feral cats. Ferals are actually easier because they don't know what a crate is - yet.