And someday I need to learn how. I was told about this in a balance class I took last year. Unfortunately I only made it to one class since the movements they had us do showed up the instability in my L5 vertebrae and created a major impingement in the nerve to my right leg. I haven't pursued the getting up part because I only had my back fused a month ago and am not ready to tackle another class that might show up another health problem.
More than one of the class participants talked about one of the other classes at the gym and how they taught how to get up even if you have major mobility problems. It may be worth discussing this with your doctor and finding out if there is a physical therapy location that can teach that.
The last time I fell was in the hospital - I had a vasovagal syncope (extreme low blood pressure) and fainted, hitting my head and cutting my scalp. Other than a bad bleed and now a raised scar hidden by my hair, there was no lasting damage. And I learned that one symptom of low blood pressure is nausea - which was why I had not waited for an aide to help me into the bath room. I didn't want to throw up on the floor or the bed so I took myself and leaned over the sink. Next thing I knew I was under the sink and everything was really grey. My blood pressure was something like 60/47 - not conducive to staying vertical!