Perceptual Expectation

I can't tell you how many times I've worked on a crossword puzzle and have read a clue and started to write in the answer, only to discover that the word I know without doubt is the correct one is one letter too many/too few for the space. Or--the word fits, but throws off all the other words around it. I will then re-work it, sometimes doing all the words around the trouble spot, thereby filling it in by default. I'll look at that word and think "That doesn't have anything to do with the clue!" I will then look at the clue again and find that I've transposed a letter, left a letter out, whatever, changing the clue entirely. Or--maybe in a 2 word clue, I've read the first word and the first letter of the second and assumed a different word.
Perceptual expectation.
This has happened many, many times, and never fails to annoy me. I'll wonder how on earth I imagined a different word in the first place. I got an email today that said this in the subject line:
Get Hi-Def Drama with New Mega Impact Color from AVON
I saw who the email was from and thought this was a very strange email for her to send me. Above the advertisement inside, she'd written that "Avon has great sales this time of year, pass the info along, etc." then the most outrageous statement of all: "Great gift ideas as well."
I thought "What on earth?!?!"
Then I scrolled down a bit, saw the advertisement and said "This is all about make-up!" THEN I looked at the subject line again and realized that it said Mega Impact COLOR--NOT "COLON"
I had originally just glanced at it, thought I saw something having to do with a remedy for impacted colons (which is why I thought my friend was kinda strange) and hadn't even seen the word AVON. Then I open the email and see about Avon having great sales on the stuff and that it was a GREAT GIFT IDEA????
I have to admit I just looked at the make-up ad for a second or two and really re-thought my friendship with this woman before looking at the subject line again. Then I had the best laugh I've had in days. Actual tears in my eyes over this.
Thanks for the laugh, Nadine, even though it was my goofy perceptual expectation that caused it, and keep the emails coming! I never know what I'm going to THINK I see!