I'm glad someone else also thinks about these things.<br>There's also the issue of matter already existing in the space where ever you're teleporting to and the lack of matter where ever you're teleporting from after you've teleported. You wouldn't want extra matter to already be in the space you're soon going to be. Teleport into a rain or just a pool -&gt; water in lungs. Assuming you're able to somehow move the matter at your destination aside, both ends are going to have a sudden change of pressure which would result in a loud boom on both ends. To avoid that you'd need to move the matter from destination to source.<br>You'd also need to take the air pressure difference into account - sudden depressurisation causes death, don't become a statistic!<br>At extremes, there's also the speed of time.