Sometimes you're met with an image or a post that raises some questions. Whether it's a "blink and you'll miss it" sort of situation or hidden in plain sight, either way, they all fill you with the same odd questions about the implications of the image itself. This is where Reddit's /r/holup shines, providing a boatload of photos, tweets and posts that all give you the initial "Wait a minute…" reaction.

Each post here has a minor caveat that makes it a lot more interesting once you notice it, telling you that not everything is exactly as it may seem. It's always important to focus on the minute details, especially in this collection, filled with various mind-boggling or strange posts that will make you question the strange world we live in. Prepare to be teleported into a unique world of mind-boggling proportions, where the uncanny is normal and every image is filled with unwelcome surprises.