[Now this is an issue Karl knows much about. See: broken light post a foot away. From the looks of it, this is Danny's first day with it. Oh the poor pens and pencils that will not live to adulthood.]

Focus intensely when you touch something. Doing so and testing out what level of strength leads to destruction and what doesn't will ensure you gain control of it more quickly. [a beat] Pencils make for a good practice tool.

[And for the love of god don't try pens. They are the devil. An evil, ink-filled devil.]