And what if a whale eats me?

Martin has a very rich imagination, which can sometimes play a cruel joke on him. He imagines something terrible happening, and because of this, he starts to fear doing anything and trembles like a aspen leaf.
What if all the balloons at the party pop at once?
What if he gets lost in the forest during the school trip?
But Martin's mom finds an interesting way to tame her son's fears. What if everything that happens is only for the better?