You stop just before you dive into the blackness. "What happens if I jump through?"
"Well, you don't have a body in that universe right now, so bad things!"
"What, like I'd become a ghost?"
"No!" Corrin says. "Far worse!"
At this point, the elves start singing again. It's a long song that seems like it was ripped off from Charlie and the Chocolate Factory, and we're not going to post the lyrics. The bullet points, though, are that since you don't have a body, you'd end up possessing something in your world, probably socks since you're by the socks pile, and then you'd end up stuck there until the owner of them either washed them again or until they wore out and were permanently discarded.
"You could be stranded like that for months. Years, even!"
"I'm stranded here for fifty years," you note.
"Sure, but...you could learn all our songs!" Corrin says.
"Wow," you say. "That's a great point. And until then, I what...get to shove clothes around?"
"It's all about the energy of those clothes," Pippin says. "There's a song...."
"No, no, no. I mean...sure, that sounds like fun. But still...that's my home."
"You know," another elf says, "he could be the test pilot we were looking for."
"No, it's too dangerous!" Pippin says.
"What do you mean, test pilot?" you ask.
"Well...energy is gained by items when they're used by someone in a high emotional state. Knowing what states cause what energy would allow us to better choose what clothes we grab. Here, give me a C, a bouncy C...." says Pippin.
"You don't know that?" I asked.
"We just get the clothes, we don't know what they've been through," says the unnamed elf. "If you'd be willing to inhabit the clothes, and report what happened...it might give us an idea of what correlates with what. And the good news is, it might take about thirty years off of your time here, and get you home sooner."
"So what's dangerous about it?" you ask.
"Well, just that you could get stuck over there for a long time," Corrin says. "And while eventually everything gets discarded, and you still end up back where you started...if something gets packed away you could be stuck for much, much longer than fifty years."
Well. That is a good point.
"I have a good song about it," Pippin offers.
"I'll be your test pilot," you say.
"Terrific! Let's send him out...."