Let's play a guessing game. (Sorry Sacramentans, you have to sit out for this one because you might already know the answer!) What are those thousands of little jumping beads at the base of this oak tree? If you say monster eggs, you're close! They are jumping oak galls, seed-like balls that oak trees form around wasp larvae. It sounds like nightmare fuel, but don't worry. The wasps that grow are harmless and smaller than a housefly. Still, that monster egg guess wasn't far off from the freaky truth!