Yeah more than once. I snorted almost half a gram of great coke in one line and proceeded to tell a mortified friend exactly what I'd like to do on her...
I once took 2 clonazolam, waited half an hour, took another 2, blacked out and woke up in hospital 2-3 days leter. When I was discharged I found the packet in my pocket and there was 4 left out of 50. That was unintentional though, but even so 4x1mg clonazolam was pretty silly. There was also methadone, crack and heroin involved in that odyssey, but I only found that out after I was sacked and they produced all the paraphernalia in my dismissal meeting that they'd found in the bin. I had to be naloxoned at work by paramedics too, not my finest hour. I was a fucking support worker as well!