"Well, it's not a wormhole, not exactly," Topher answers. Right, he should stick to the actual science with this kid, rather than vague terms. "We don't know exactly how it works, but... Here."

He reaches into his bag and pulls out a gadget with a large screen showing various read-outs, showing it to Luke. "This is a basic read of the rift energy at the lake. The energy's strongest here, that's why I was here, I was measuring it. See that spike, there?" he explains, pointing. "That's when you came through."