thats happened to me before....its called a big hit......i would recommend that you use a glass bong or pipe or papers if you have never tried a glass bong before.....gravity bongs are cool but the aluminum and plastic and all is not cool in my view......but hey i have taken many gravity bong hits, and they do mess you up.......but not as many as other methods....i prefer a chilled glass bong with ice and some bob marley