This parody of Robin Thicke's "Blurred Lines" should appeal to grammar nerds! It is one of eight videos released by Weird Al Yankovic over the past week to mark the release of his new album, "Mandatory Fun." The videos did their job: the album debuted at No. 1 on the Billboard charts with more than 80,000 units sold.
The lyrics (see here) contain some useful grammar lessons, but it's worth noting that the use of the word 'spastic' in the line "That was sarcastic, ’cause you write like a spastic" would be totally inappropriate in British English, as in the UK it is considered an offensive way to refer to disabled people.