Make sure you hold your hits in for ~20s or so. How much do you weigh? 100mg of 5x is probably only good enough for 3/4 of 1st timers up to 150lbs (in my experience of ~15 1st time smokers of 5x). Try 200mg. Of course potency will most likely vary from batch to batch and even more so from supplier to supplier.I packed about 90mg into a bong and ripped it.