Driving across the planet to collect rocks wasn't anywhere close enough to what Tezuka wanted to do so close to his birthday. He just wanted to reread the entirety of Bounty Hunter and perhaps get some cuddles from Jirou relax with a book. Maybe tend to Marilyn. But nOoOo, he was out here, covered in dust from head to toe, and said dust was also getting in his eyes as he drove this stupid ATV. At least he made sure everyone was strapped in for this bumpy ride.