I must have been aged 9 or 10 on the ministry with my Dad. We got called in to a young guys house and I started complaining to my Dad that I was feeling a bit light headed and sick. There was an unfamiliar smell in the house and then when the guy went out to the kitchen to make us both a drink, my Dad whispered to me that he was feeling squiffy also. My Dad explained to the guy that I was feeling poorly so we had to leave. It was only recently (25 years later) that my Dad mentioned it to me and told me the guy must have been smoking a joint before we got there and thats what the smell was. I just wonder how my elder Dad knew what the smell was!