First DIY oil change on my '01 X...sometime in the first year I had it.
I had done oil/filter changes on dozens of cars ,and several m'cycles over the decades.
But, I was not prepared for that 8 qts of hot azz oil gushing out of the pan, when I cracked the oil drain plug. I had a large capacity catch pan, a few newspapers spread under/around the pan, but I had slud up and under on my back, with no jack stands, and when I cracked that drain plug it was like a hot, black Niagara Falls pouring out.
I got better at it, devising a piece of bent cardboard to give the oil a 'trough' to run out, and using cardboard 'dams' to contain it in the catch pan. But, for a first time X oil changer, it was a surprise, never having had a car that gushed 8 qts, when one is pinned in, under there...