Muppet grammar grinch creeps into class

[KnottedYet]

lack of commas and incorrect capitalization of the word "I"

Thanks CC, that was a funny joke! Made my evening (just spent some looooong minutes talking to the phone company, so your joke really cheered me up!)
Gimme a hint, what other grammar and spelling boo-boos did you put in there?

Edit to add: oooh! I found another one! No apostrophe in the contraction " 'tis" (short for "it is") Cool! Don't give me any hints after all, this is more fun!

Edit again to add: Oh, oh, and no apostrophe for " 'round" (short for "around"). this is awesome! Thanks, I needed this!

Edit again again to add: are the ampersands considered a grammar no-no?

Edit again again again to add: no infinitive with "check". ("to spell and to check grammar") That one was subtle, good one!