WAA a trolley drop down from the third floor ( i think )

Today while i was in practical class kneeding bread, we ( i mean the whole class ) heard a loud continueus crashing down in the lift next to my group table. It was like a big creature trying to break out of the lift because the door of the lift was almost broken. Everyone was shock while looking at the door of the lift with wide eyes. Here are some pictures i took after the door was forced open by the repairman.











Well my friends and I was thinking how the hell did the trolley get there. There was no way the trolley can drop under the lift. Well our world is full of mysteries... hahahah