When a team of well-meaning engineers tried to create a simple loop to automate a process, they ended up with an endless loop that consumed all available system resources, causing the entire office to freeze up.
Debuggers: "We just wanted a simple 'hello world' loop, and it was supposed to print 'hello world' to the console. Instead, it printed 'hello world' to the console forever and ever and ever...".
Another team of engineers thought they were being clever by reusing a variable to store data, but in reality, they just created a memory leak that slowly consumed all available system memory, causing the program to crash.
Debuggers: "We just wanted to store some data, and it was supposed to be stored in memory. Instead, it stored itself in a never-ending loop, causing the program to crash and the system to freeze."
A lone engineer tried to write a program to calculate pi, but ended up writing a script that would print every error message it received, causing the console to fill up with error messages, making it impossible to read the actual errors.