You have to understand a vaporizer will force more THC into your body than anything else will short of eating "magic brownies" so is it possible you never got that high before?

Heres an example- i personally grow Northern Lights#5 which has a THC content of about 20%. However that does not mean that when you use it you are getting 20% THC. Smoking that type of weed in a blunt will only get you 3 to 5% of the possible 20%. Using a vaporizer knocks your dick in the dirt at anywhere from 11% to 15%. That's a big difference.