Long time user of nitrous, had my nanger for about 3 years it's a decent one had many a good time and many a thousand nang put through it but last night something scary happened, after smoking some nice bud my mate loaded up the nanger (we usually do 2 at a time) and after he did it went into the usual nang state but when he came to he began to vomit and feel very unwell, he was recently discharged from hospital so we both put it down to that and off he went. So I load myself up a few nangs, down the hatch and the once pleasurable feeling was not there, I was vomiting, in and out of consciousness, extreme vertigo and intense shortness of breath (to the extent the mrs has 000 ready to dial) it took a good 20 minutes for me to remotely come good. Furthermore the day previous we were sucking nangs out of balloons and felt perfectly fine. Can anyone shed some light on the possible cause of this?