Try Working Dis Out!

Take your time and see if u can read each line aloud without making a mistake, the average person cant:
this is this cat
this is is cat
this is how cat
this is to cat
this is keep cat
this is a cat
this is idiot cat
this is busy cat
this is for cat
this is forty cat
this is seconds cat
Now go back up 2 da top and read the third word from every line down. Hehehe!