In chronological order too! 
1) I had just spent three days at a Roleplaying Game convention, and around fourteen hours of each day was spent playing some game wherein you could hypnotise, or “enTRANCE” people. I always played characters that could do this because I hate playing characters that could fight - so for three days straight I was enTRANCING things.
The drive home was eight hours, and I hadn’t slept much. I pull over at a gas station to fill up the tank, and while the gas is flowing into my car I’m staring at the doors to the building.
Above the doors in bright pink neon letters, is the word, “ENTRANCE”.
I spent the entire time I was pumping gas, trying to figure out why the building was asking you to enTRANCE stuff. Is this some sort of new gas company? Are they trying to make the point that their gas is so amazingly good it will leave you enTRANCED? Or is it just that neon lighting is relatively rare in this remote part of the country? WTF?
Someone then walks out of the door. And. DUH! It’s not enTRANCE, it’s ENtrance! Like, the door what you go in!
2) A friend of mine found a giant black rock in her back yard. It was huge, but it was relatively light.
She hands it to me and says, “Look, onyx!” I say, “I don’t think it’s onyx.” She says, “Well, why not?” I level my most serious, I’m-so-academically-superior-to-you look upon her, and say, dryly:
“Do you know how much a chunk of onyx this heavy would weigh???”
3) I’m standing at work after a long day, and staring out at the sign across the street.
You know those … well, production companies I guess, with the clever names like “Panavision” or “Sonyvision” or “UniVision”? Well I’m sitting there marvelling at the sheer genius of the new clever name on the sign across the street. I’m wondering why nobody thought of it before, it was such an obvious ingenius brand name of whatever-those-names-are-representing. I mean, I could just see the whole marketing scheme unfolding before my eyes, it was marvelous and I was in utter awe. I was a bit confused as to why, after this marvelous brand name, the words “repair shop” were present. I’m not clear on what the business or product these names sell actually is, but I’m pretty certain there’s no such thing as a “UniVision Repair Shop”, 'cause it just doesn’t make sense!
The “brand name”?
Television.
D’oh!
Now, before another “duh” moment comes upon me, I think I’m going to bed.