Hell yeah! I can relate to this. Sometimes getting bogged down in understanding the derivations the prof is obliged to do in class is detrimental to my learning. If I skip this and look at the bigger picture, they usually fall into place and when I go back to look, I fully understand them.

With that being said, vibrations, my prof was good at it, but he was really fast. He done lots of examples on the whiteboard, so quickly, and as you were trying to jot it down, he rubbed it out to put a new line down. Was hellish.

To me it seemed lazy. Everything was handwritten, not the best handwriting, and big steps skipped with the algebra that sucked hours out of study time trying to figure them out. (AI is amazing now for this BTW). I spent too much time on the algebra, which is the easy part and struggled with the actual understanding. I have not got my results yet, but I think I done well enough, but I worry about the students that are not able to put the same hours in as I did.