Pascal always takes me down memory lane...to the very young me, family just got the first PC. I wrote the first "programs" in good old QBasic but that couldn't create executable files so I bought a random book on Pascal (yellow book, something with 7.0?) I saw in a store which came with a floppy that had a compiler (and thus allowed me to create the magical .exe files). Thinking about this makes me smile for multiple reasons (one of which is that back then for me computers were exclusively Microsoft OS based).
The program that I wanted to write? A password protection for the new PC (loaded from autoexec). Highly insecure by design but I was pretty happy to get it working :P
The other genius idea from that era was randomly outputting sound (length, frequency etc.). My young self figured that I only had to let the program run for a while until some cool sound effects would be found...well the result was rather unpleasant :D
One of the more enlightening moments of my early development as a programmer was looking at assembler output for Pascal vs. C. It never occurred to me before that C-style is just one way of doing it and I had assumed that parameters are always right to left because "that's how it is" :) [must have been around the time when the Phrack with "Smashing the Stack for Fun and Profit" was released as that was when I got interested in assembly]