While in line for Griffon someone smoked an e-cig.One dose not simply smoke an E-cig they vape lol. I have used them in lines the last two years, last year not very excepted, this year it dose not seem to effect people. I do not believe in using them on any ride because it seems like a hazard to others if it were to fly, not to mention it seems like it would take away from the ride.