He wasn't thinking too hard about Seamus, just the goal of the field, concentrating on trying to win. It was a silly competition, but he had always been competitive, and in a low-stakes environment like this he still could be in a way that he really enjoyed. He took a careful breath, hoping to Godric that he wasn't going to crash into the field too badly. He was pretty sure he was going to crash, purely because of how hard he was pushing his broom, but if he managed to not fly off the end he'd be pleased.
As he came within throwing distance of the ground he raised up again pulling up hard to flatten out and slow himself down. He bumped hard into the ground, holding tight so he didn't smack his face onto his broom. Still, he jerked as he skidded a dozen feet or more, leaning back and gripping hard with a cry of "Fuuuuuck!" He scraped to a halt and promptly fell sideways off his broom.
He was basically splayed on his back in the end and lifted his head to see that Seamus had clearly landed a few seconds behind him, just coming to a halt. He held his hands up, leaves sticking slightly by virtue of pressure, sweat and a little luck.
"You okay there?" he called. "Nothing broken?" He knew he was going to ache like hell tomorrow, but for the way he was feeling right now it was worth it. He hadn't thought about Ophelia or his nightmares pretty much since he got on his broom. Although it would probably come crashing back before too long.