It sounds as though the patient smoked a very strong indica strain of cannabis. The indica strain gives a body stone, which makes the body feel heavey, altohugh it is very relaxing. Chances are the patient has never smoked this type of cannabis before and didnt expect the strength. I highly doubt it gave him/her any hallucinogenic effects, although if he/she didnt expect this feeling they may have had a panic attack. Alot of people do have them, for some reason, although everyone knows that cannabis is harmless, and hasnt killed anyone EVER before.

The other explanation is the cannabis could have been laced with almost anything in liquid form, although i highly doubt this as its SO rare.

Thankyou for actually taking the time to ask us, were the ones who smoke it daily, in not hourly and were the ones who know what it does. The government spread so many lies its unbeleivable.

BUT always remember, cannabis cannot kill, no matter how strong, or how much is smoked. Its never killed ANYONE in its history, it wont start now.