Did you fall for the trick because at first I did to
(If you didn't read the pic or can't here it is)-
READ THIS OUT LOUD:
This is this cat
This is how cat
This is to cat
This is keep cat
This is an cat
This is idiot cat
This is busy cat
This is for cat
This is forty cat
This is seconds cat
Now go back and read the third word only in each line from the start