LOL that was at my old Job and mechanics didn't chock the airplane. Plus you are just looking at 1 tire of the 18 on the 747. There is more chocks on the other side and the body gear plus the tug was hooked up and the nose gear chocked.
That was a 747-300 with nice CF6 turbofan. Nice and smooth.
The Pratts we had on some of the older models were like an old washing machine. Most of the oil I see under engines is usually related to servicing. Especially X airforce guys. They are pretty messy.