shootall,
a serious answer to your just for giggles question.
there is no credible , testable , repeatable science about parallel universes, time slips, other dimensions or rifts.
there has only been questions, guesses and speculations on the part of the top minds in any field of science.
based on what is known to science about quantum theory and physics, there have been some hypothesis' that have been put forward, but can not be tested. for some really quirky reasons that i have tried to understand but cant, time and light are connected in a way that science has barely a grasp on , but as i understand it, light on a molecular level changes with time , not age, but how we can percieve light itself changes.. so if a object could jump thru a rift, we'd not likely be able to see it anyhow because the light it relfected and absorbed would not be detectable by our eyes.
so, lets say for fun , ole bigfeet can jump into our time.. we'd never been able to see him anyhow.. so we'd never ever had this discussion at all.. in all our collected reality, BF would have never been a topic. however, we do talk about BF, some claim to have heard, seen and have collected evidence.. there for it has to .. has to.. be a real live animal in this reality / time / dimension..
there for it has to follow the quantum physics of this reality too.. or be a figment of imagination and myth.