A snake is a symbol of the number 8 but when encountered in a dream, soothsayers say that the snake brings good luck or good tidings. And when the snake appears ferocious or in a manner to strike you, that is definitely a bad omen of things to come. I remember the olden days when there was this numbers game called Jueteng where your 1 peso bet could win a thousand pesos if you guess the 2 numbers. The usual bet of the number 8 is because of that dream about a snake. What's funny is, that bet does not win.