It reminds me of a story I was told as a young typewriter engineer some twenty-odd years ago in the City of London. We carried our tools in a medium-sized Samsonite type toolcase, and for a laugh one of the lads filled the new boys tool case with shaving foam. On his first call of the day he visited a large company directors secretary to fix her electronic typewriter. Sitting at her desk with his toolcase next to him, she explained the problem. On opening the toolcase and finding it full to the brim with shaving foam, he immediately slammed the lid shut before she could see his predicament.
Well, with a bed of air between lid and base, you can imagine what happened to the latent foam inside. The resultant spray reached five feet outwards and upwards, covering the desk, the walls, his legs, the secretarys brand new skirt (who was standing behind him at the time)and most of the carpet in the immediate vicinity. Cleaning up the foam took the best part of an hour, but it was the strong aroma of Brut 33 that left a permanent reminder of his visit.