Optical Illusions are always fun, so if you come across any, post them in this thread.

I'll start off with a few, some of the bigger pictures and answers are behind spoiler tags.

Spoiler:

(under a spoiler cos it's quite big)




Which is the longest horizontal line?

Spoiler:
	None - they're all the same length!

Are these staggered lines perfectly horizontal?

Spoiler:
	Yup, they are

Count the black dots that appear


How many prongs does this object have?


What do you see: two faces or one candlestick?

Spoiler:

This one's in a spoiler because it's quite big

***

The next few are all chalk drawings on a street:






***

This is a still image!

Spoiler:
	How many hidden pictures can you see?

Spoiler:
	Stare at the picture and scroll up and down the page quite quickly.

where are the BLACK DOTS my brain hurts from trying to find them all i found a total of ZERO LOL

The one with the water is in my maths classroom. Some of them things make my head go funny lol!