Hi I have the same problem of feeling like slipping. no problem on grass or carpet.also pins and needles in hands and feet at times. I slipped on a tile floor 3 years ago.suffered a small brain injury however don t feel like I have completely recovered. memory loss ,able to do things that are every day stuff however have no confidence to try new challenges. feel like the side of my head that was effected is abit dull in responding( left side) it s my right foot that has slipping sensation.
Your narration about your head injury is not complete. I am assuming that you have unilateral complaints of pins and needle sensation along with slipping on right side. Then it can be related to head injury on left side of brain around motor and sensory cortex. However, if you have pins and needle sensation in all limbs then you have to be evaluated for causes of peripheral neuropathy like diabetes, renal function, nerve conduction study, immune profile.  Hope you recover early.