Sour, your description of the stairway reminded me of a definition from "sailing: a sailor's dictionary" (apologies to any who find this too non-PC)
"Distress Signals - International signals which indicate that a boat is in danger. For example, in Italian waters: moaning, weeping, and wild gesticulations; in French waters: fistfights, horn-blowing, and screamed accusations; in Spanish waters: boasts, taunts, and random gunfire; in Irish waters: rhythmic grunting, the sound of broken glass, and the detonation of small explosive devices; in Japanese waters: shouted apologies, the exchange of calling cards, and minor self-inflicted wounds; and in English waters: doffed hats, the burning of toast, and the spilling of tea."
Hmmm. I don't see "insane laughter" anywhere in that list, but then, nor is there an entry for "American waters." Maybe they gave you wide berth, because they thought you were sinking, and didn't want to get sucked down too?
"Distress Signals - International signals which indicate that a boat is in danger. For example, in Italian waters: moaning, weeping, and wild gesticulations; in French waters: fistfights, horn-blowing, and screamed accusations; in Spanish waters: boasts, taunts, and random gunfire; in Irish waters: rhythmic grunting, the sound of broken glass, and the detonation of small explosive devices; in Japanese waters: shouted apologies, the exchange of calling cards, and minor self-inflicted wounds; and in English waters: doffed hats, the burning of toast, and the spilling of tea."
Hmmm. I don't see "insane laughter" anywhere in that list, but then, nor is there an entry for "American waters." Maybe they gave you wide berth, because they thought you were sinking, and didn't want to get sucked down too?