"Why you no precise?"
Timothy and a training yard were a bad combination. He had a lot of powers to show, and he wasn't scared of showing them, because even though the majority of these goblins were a couple of levels above him in terms of mana quality, he did not fear them. A couple of levels weren't enough to protect one's self from an Electro Nerve Splitter attack, for example, and that was why he did not fear anyone here!
Tim, and the remaining team members were sent to target practice, and the targets here were made entirely out of stone. Since the training yard was more of a field, stretching a hundred meters wide, he had all the room in the world to portray his powers in a barbaric manner, without worrying about hitting someone by accident!