Never had a Chisel do that to me as I used to smoke these on a regular rotation but the Oscuro Especial got me once a few years back. I was on the train headed home from work(Still living in NY at the time) when a friend asked if I wanted to meet up at one of the locals. Got there around 7ish and had not eaten since 12ish. Decided to smoke an Oscuro Especial and all was well until I decided to get up to head home. I was wobbly as soon as I stood up. I stopped for chinese food on the way home hoping it would help and when I got home I still felt like crap so I decided to take a shower hoping it would help the nausea pass. Nope, instead I yacked in the shower. Felt great after that though.