"Could be. The technology we use has been developed over the decades, had stuff added on as we figured out more, but it's definitely not something anyone who's ever been in Torchwood could say they're an expert in. Even me! Temporal rifts were never my thing."
Uh oh. The Doctor saying to hold on to something is pretty much a guarantee of a bumpy ride. He gets his arm tight around Ianto and grabs onto a rail with his other.