When Roadrunner paints the boulder with invisible paint, the edge of the cliff CAN be seen through the now invisible boulder. But when Roadrunner pushes the now invisible boulder off the cliff and lands on top of Coyote, Coyote can NOT be seen through the invisible boulder.
When chasing Roadrunner with his hand rocket, Coyote is able to go around a sharp right turn. But when he finds himself heading directly toward an oncoming truck, he does not turn away from it, or even go around it. Instead, he does a header right in to the truck.
Coyote paints a brick wall invisible. Roadrunner, of course, runs right through the brick wall. Coyote gives chase, and crashes into the brick wall. In doing so, he crashes through the brick wall, destroying it. One of the bricks from the wall had been thrown up into the air when Coyote crashed through it. When it comes back down, it hits Coyote in the head. BUT when it comes back down, it is no longer invisible, where as the remaining brick wall and the debris from the demolished brick wall is still invisible. Since they were all painted at the same time, all of the bricks should become visible (losing their invisibility) at the same time. Instead just the brick that lands on Coyote's head loses its invisibility.
The Hand Jets the Coyote reads about in the Space Science book would actually be small compressed air jets, designed to move an astronaut in space, where there is no air resistance. They would not be strong enough to propel the Coyote in the atmosphere of the Earth.
When Wile E. Coyote's invisible paint wears out on him after he crashed into the invisible brick wall and destroyed it trying to catch the Road Runner and he turns visible again injured and dazed while a falling brick hits him on the head, the soles on the bottom of his feet repeatedly change colors between brown and tan.
When the coyote paints the brick wall with the invisible paint he only paints one side of the wall yet the whole wall becomes invisible.