Author's comment in the infamous miscarriage arc in Ctrl+Alt+Del:
And I know that [a miscarriage]'s often much harder on the woman than on the man.
Cyanide and Happiness even made a superhero character (or at least a stick figure man) called Captain Obvious.
DICE: The Cube That Changes Everything: During the War Quest Mio senses a Dicer and says he may not be on the Defense team. As she already knows, she and Dongtae are the only members of the Defense.
Freefall: some guy to Florence: "You're a talking dog!" (Technically she's an anthropomorphic red wolf, but...) He even says it twice for good measure. He does redeem himself a couple of strips later by deducing what she does, where she came from and who she's working for... without tossing her out afterward.
Gil: Good evening. Are you enjoying the party? Orotine: How interesting. You do not immediately mention that I am a Muse. Gil: I rather assumed you knew. Orotine: You would perhaps be surprised at how many do not make that assumption.
Tom Siddell, Gunnerkrigg Court author, sometimes writes some hilariously (and intentionally) redundant sentences in The Rant, such as "The background is white".
Also, on the very second page "YOU'RE DEAD!" Spoken to the zombie with glowing orange eyes and green skin covered in stitches. He then goes on to clarify that "...you're more of a...hm....living dead since you know..."
Karkat: <twenty solid lines of ranting about how he wants the current topic of conversation to go away> John: dave, i'm pretty sure we're making karkat uncomfortable now.
Richard:(stunned)Missionaries. Maikos: Of the gods. Richard: Of course of the gods. Would I have made this face if they were missionaries of the carpenters? Maikos: My apologies.
Also from xkcd, his Other-Wiki-style-superscript "Citation needed" for statements in his "What If" column that fall under this trope, which may count as lampshading.