When I was in the US with another Brit buddy we went out for a curry (Gaylord Chicago IIRC) and each ordered a vindaloo. The head waiter was dispatched to our table to warn us this might be too spicy. When we told him we were British he nodded, smiled, and said "I understand, I'll let the kitchen know."
It was still a bit on the mild side for a BIR vindaloo.