Your initial pain, suffering, and the chronic pain that might follow are serious considerations. It sounds like Outback was negligent and they need to compensate you for the consequences of the accident. File a report with the local city or county office that supervises restaurants. See a doctor and find out what was damaged. If there is no permanent damage, send Outback a letter stating that you haven't retained an attorney, but you reserve the right to do so, and then lay out your settlement offer as an itemized list. I'd ask for full reimburesement of medical expenses, rehabilitation expenses, any lost wages, and $10K-$40K for pain and suffering (depending on the length of time for recovery).

If there is permanent damage, or if they balk at your offer, you need to hire an attorney to represent you.