Radar has learned to dislike vet visits and cries when we get there, but for some reason he still adores our vet and still leaps into his carrier at every opportunity, even though it may mean he has an appointment with the dreaded rectal thermometer.
Sonic is the one who can sense a vet visit a mile off, when we took him in to be neutered we started off with Plan A, which was get the carrier out and let him go in it. Plan B involved trying to stuff him in it through the front door while it was horizontal on the ground. Plan C was to tip the carrier up onto its end, and load him in from the top. It was at this moment that I questioned the wisdom of getting a very long-legged and bodied breed of cat, even not yet fully grown, his back feet reached the bottom when half of his body was still sticking out of the top and it was at that point that I first realised just how muscular he is. The farce continued (we were starting to run out of serious ideas at that point) with a move involving a towel over the head (his head, not mine) to cause confusion, and a highly ambitious sleight of hand move to unhook his front claws from the edge of the carrier with the other hand, and lower him in while his balance was off. I just managed to get the carrier closed in time to stop him exploding out of it. He wailed very loudly and indignantly in true Oriental fashion throughout the bus journey, earning us some very strange looks from fellow passengers.
I suggest the towel maneuver described in previous posts.