...And not just the 580ex but the SB25 took a nip out of them too! So it's new years eve and I'm wearing my Calvin Klein pin stripe for the second time only. We're all together (14 of us) in a white room so Mr Photographer here with adequete dosages of liquor in him gets a bright idea (as we snapheads do). I thought to myself I'll set up a couple of flashes to bounce of the walls and hope for a few nice ambient snapshots. So I put the receivers on the flashes and wanted to test that they'd flash from the test button on the transmitter as you would, in doing so I don't want to blind people so I put the flash on my lap under the table. This is where the shock horror begins.... I tripped the SB25 and saw a mark and thought "you're drunk ya monkey don't be ridiculas". Then I tripped the 580ex and not only did I see smoke but I could smell the smoke from the scorch... The moral of the story is don't hold flashs against your good threads - or always keep a flash handy in case you're ship wrecked and need to start a fire on some remote desert island. btw there are 2 marks but I just snapped one for you.