With Klein's mind not functioning properly to think of an excuse, he could only do one thing and that is to ... cover Calix's eyes with his hands
"Waaahh!! Stop looking at me! I wasn't staring at you!" Klein said out of panic and the force behind his movements causes Calix's eyes to sting greatly
"A-aww! S-stop! Do you want us to fall ?!" Calix was barely maintaining their current balance. If Klein were to continue moving like this, they might really fall again
"Yes! I want us to fall!" Klein gave a quick answer that made both of their bodies stiff
Klein wants the both of them to fall? Even Klein himself realizes that his words were misleading
He simply meant that they want us to fall into the ground so that they would momentarily forget what just happened earlier (aka Klein staring at Calix's face)
