"You might have," John agreed thoughtfully. The Tardis had been just as much Rose's as it was his, in some regards.
"It's like accidental summoning, maybe." He scrunched his nose when he thought and then pulled out his sonic screw driver just to fiddle with the settings and scan the Tardis for no good reason other than to say he did it. "It's not like we necessarily ask for things, or even get them when we do want them."