Spiders may not be the most popular creatures, but German art student Friedrich von Schoor appears to have no problem with them — earlier this year, as part of a project at the HBK Saar art college, he used video of an ordinary spider in a small tank to create a terrifying projection on to a full-size building. As shown in the video below, the trick relies on the tank having exactly the same proportions as the building's floor-to-ceiling windows, allowing von Schoor to scale up the resulting video and place it accurately in its real-world location. It's an illusion that can be extended to any glass-fronted structure, providing a scaled-down tank can be built to model it — could we soon see snakes in the UN building, or cockroaches crawling up London's Shard?