so i was telling my friend about lucid dreaming, and he was all excited about it. He asked me a bunch of questions, most of which i could answer, but there was one that i couldn't

the question was
can you affect yourself in real life, using lucid dreaming as a "control panel"? such as giving yourself better penmanship, or (eek) putting yourself into a coma?

if any of you could answer this, i'd like to tell him what you all say