Tim sat bolt upright, awakening suddenly from a deep sleep and a fever dream of wires, and radio waves, and... and... He grabbed the pen and notebook he kept by his bed and sketched furiously, labeling every section of the drawing to be sure he'd not forget it in the morning. He glanced at it one more time, nodded to himself in satisfaction, put his head back down on the pillow, and fell back asleep.
He awoke at 7 AM and saw the notebook lying beside him on the blanket. He picked it up, stared at it intently...
Crap. He'd dreamt of inventing a bunch of stuff that'd already been invented...