Gah, can't believe I called that an explosion affect... Considering what I had to work with at the time, it's understandable. But still... Special effects aside, exploding berry trees have been a running gag throughout the comic. In the games, right after you pick the berries the trees disappear, leaving the group empty and ready to be replanted. But where the heck does the rest of the tree go? They could dissolve or something, but having them explode works too and makes for much better gags.