im competitive on one foot

we're about to have a picnic:

MQ: If you can’t find anyone for the leg race, I’ll do it with you. I’m competitive when it comes to games.
melissa: Hehheh.. M, I was kidding. I really have a foot injury and I cant be putting that kind of strain on it. But thanks for the offer
MQ:Ok. That’s very funny. I didn’t hear that part! You should try hopping on 1 foot.