Quote from Georgie in the episode An Old Mustang
Jim: This road trip's feeling like a bust. Georgie: I've been on worse. Jim: Than this? Georgie: Oh, yeah. Once, my dad took me and Sheldon to Florida to see the space shuttle launch. Jim: Oh, I always wanted to see that. Georgie: Me, too. It got rained out. Spent the whole time in a motel room listening to Sheldon complain. Jim: You know, I can't imagine what it must've been like for you to grow up with a brother like that. Georgie: No, what I'm most proud of is how many times I kept his sister from killing him.