On my Delta flight, as the plane nosed up to lift off the ground, there was loud bang, which sounded like an explosion. That bang was followed by a series of subsequent smaller, little booms. Several people gasped and screamed in fear. I would have been one of them if I hadn’t been sitting in the front, row 2, close enough to see what was really going on.
A latch on one of the cabinets in the kitchenette came loose, and all the contents fell out and were flying all over the small space. The noise was the sound of the cabinet door slamming open against the wall and the items inside falling out hitting the floor and the walls. After reaching cruising altitude, the flight attendants got up and began picking up all of the items (boxes of sugar, creamer, almonds, and other food and drink items), and one of them mentioned how she reported the defective latch many times, but it remains unfixed.
Even though I was sitting there in view of what happened, it was still unsettling initially. It really did sound like something evil was happening. Thankfully it was just a minor issue.