yeah its happened to me.. last 4/20 my friend and i got munchies together and stoner movies and just smoked steady for 11 hours... by that night i stood up and was like whoa, im not high.. i couldnt get high for 3 days after... my tolerance right now is so Damn high.. i need to stop smokin. but i dont wanna! when skunk dont get u high ur fucked!