I just today found out that the “press F to pay respects” meme is

press f to pay respects Memes & GIFs - Imgflip

Press F to pay respects : r/memes

When paying respects just isn't enough., Press F to Pay Respects

Where Does 'Press F to Pay Respects' Come From?

Press F to pay respects : r/ffxiv

Where Does 'Press F to Pay Respects' Come From?

Press F to Pay Respects Memes - Imgflip

I'm Too Afraid To Ask, Press F to Pay Respects

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Call Of Duty's Press F To Pay Respects Meme Gets A Nod In MW3 Zombies - GameSpot