Belligerent white woman: Could you get of the way?
Black teen: I be trying!
Belligerent white woman: You should speak gramatically correctly!
Smartass: “I be trying” isn’t ungrammatical. It’s standard usage in African-American vernacular English.
Belligerent white woman: Oh, what would you know?
Smartass: I have a Ph.D. in linguistics from MIT.

–A train