Jet V Jetty
BMI had a slightly similar incident at Heathrow about twelve years ago when a 737 500 parked on a spot not yet modified for that variant. The engine "rested" on a walkway barrier requiring a temporary fix and then cowling replacement at the next hangar visit.
This case was of course simpler in that the 737 500 engine is under your armpit and distance is easily judged but of course when parking you are looking at the stand guidance system not the obstructions which you "know" are clear.
Parking at night there would be a lot of glare from vehicles and stand lights coupled with a difficult judgement call as the wingtip is so hard to see
The BMI captain was awarded time with a training captain to check his parking technique