yeah I searched and searched and figured out exactly where the photo was taken. The only objects I could find that appear to match the general shape of the one in question were caps on the fasteners to secure the loose article net to the ride. My best guests at this point os one worked it's way loose and when it hit the pathway made the sound.Judging from the photos, that repair had nothing to do with whatever happened to create that bang. This just looks like something being fixed that would've been spotted during a track inspection.