By accident.

[He holds up his device, looking proud of himself like he would for a good magic trick.]

The school gave us these so we could go home or to other people's worlds or whatever. I was trying to get back and get Sam out of jail - I'm gonna bring him to Garden, let him learn a few tricks that might help with Avery and Drake.

[Aaaaand deflate.] But the stupid thing's experimental, and I ended up here instead. I guess I got a crap one.‎