Last 2 weeks or so I've been having some pretty intense lower back pains (particularly at night). Just real sharp pains, so much so my sleep has been compromised. I've been treating it with over the counter NSAIDs. Last night was leg night.. Leg presses.. Fine, no discomfort. Walking lunges.. Same thing.. Moved on to machine squat. Went down, and suddenly my lower back spasm / locked up on me causing me to fall to the floor.. Picked myself up however felt as though I was going to black out.. Blurry / double vision, headache,etc. went to sit in my car where the pain in my lower back got worse.. Called 000 (911 for Australians). Stayed the night in hospital where they gave me every possible pain drug in existence.. Morphine, Valium, tramadol, etc. pain subsided somewhat and allowed me to sleep a few hours.. Have any of you guys experienced severe lower back muscular strains? What worked well for you guys in regards to treatment? Sitting down is fine however getting up off my seat is torture.. How long can I expect to be out of the gym? I'd really like to hear your stories regarding lower back injuries in the gym.. Or just in general. Thanks in advance..