Cats Really Do Hate Water
It is a known fact that cats are naturally afraid of water. Cats are fastidious animals that spend a huge portion of their day grooming themselves. Wet fur is extremely uncomfortable for a cat and often takes a long time to dry. When cats are wet, it makes their fur feel a lot heavier which leads to them being less nimble.
In this comic strip, Albus was once again calling out Minerva for climbing the tree but not knowing how to get down from it. He even had to have Hagrid get the ladder. Getting to the bottom of the situation, it turns out that she was scared of Poppy Sprout who was only watering the begonias. Talk about being a scaredy-cat.