I do all of the "whoa", "ho", "easy", etc, and the clucking and kissing to things (animals, people, cars, things on TV....)
You have to be careful saying "ho" to people......
By the way, I always think of this time I was at the Cal Expo watching the colt starting competition, there was one horse who just didn't want to move off and even though we were far away from the pair, the ENTIRE audience was just clucking and kissing and saying "Come on, boy", etc, the entire time, without even thinking about it. There was such a sense of family to that, that we could all be weird together
I loved that!
Also, when I was working a lot on putting a better stop on my gelding, getting him to stop off my seat and exaggerating the cue (sitting way back, moving my legs forward), and began doing the same thing while driving...sitting back a lot in the seat, lol
Also I've been known to pet the dashboard when the car does what I want it to...my old car had a lot of "personality", you had to drive it the right way to get it to do what you wanted it to do, and it was a bit testy, so I used that justify it
But now I don't know how I'll justify it with the new, easy car.
I try not to do it when there are passengers, anyway, though...