I looked outside last night to see the field covered in tiny pinpricks of light. There must have been fifty plus fireflies out there. In some parts of the US they synchronize their flashes in the first few weeks of June - mine weren't completely in step, but there were periods when it looked like the flashbulbs at Fenway Park when Ortiz steps up.
Also, it turns out that they are impossible to video. Sorry about those 22 seconds of your life you'll never get back.