Coffee sign is messing with people's heads as they notice the shadow it casts

Sweet, sweet coffee . Every morning, so many of us rely on it to sort our heads out.

However, thanks to one baffling sign, it's now messing with people's heads and causing waves of confusion.

Not exactly what you want from that first cup of java of the day, is it?

One Reddit user brought the sign to widespread attention and it quickly had people doing a double take as they tried to figure it out.

So can you succeed where others have found themselves beaten?

The sign itself reads 'COFFEE'.

But What's going on here? Why does the shadow read 'COFEE'? Eh?

While there were suggestions of witchery and magic (jokingly, we think), and plenty of cries of "What the F" (we see what you did there), there were also some genuine suggestions, and these all seemed to point at position of the lights being responsible.

One user pointed out "The f lies in the middle of two rays. Look above the letters and you'll see two lights with our missing f in the center of them.

You'll need a coffee to deal with this opitcal illusion (Getty)

"The shadow is cancelled out by the intersecting lights."

Another backed this up, adding: "The lights are equally spaced so the shadows of each F at an angle blend together."

Phew, mystery solved.