Is it possible to see two primary rainbows in the sky at the same time?

Just to expand on this - I don't mean a typical "double rainbow" whereby there's a primary rainbow and then the secondary one which is in reverse colour order. I mean as in two rainbows in normal colour order and of equal brightness, either as two completely separate entities or as an "M" shape. I might have very confused memories from my childhood but I swear I've seen an "M" shaped rainbow before. That said, I have been known to have extremely vivid dreams and as a kid had a very good imagination!