I went snowboarding with some friends some time back, and none of us had very good French. Late in the week, once we’d all got a bit better and were progressing pretty well down the mountain in our lessons, one of the French guys who was also having lessons wiped out in truly spectacular fashion, and lay groaning in a heap in the snow.
My friend, wanting to show some sympathy, went over and asked “ca va?”, at least he meant to, but actually asked “d’accord?”. My French isn’t good enough then or now to know whether he actually went over to an injured Frenchman and said “Agreed” (or even if ca va was appropriate), but that’s what we thought it was when we ran it back later, and it still makes me laugh thinking about it.