Who do I sue?

I need to consult my lawyer about future accidents in my wheelchair because they are coming.

I want to know who is liable when I flip into the road because my wheels don't go up and over bumps as they should. Do I sue the wheelchair maker, the wheelchair provider, all of the above?

Tonight, I realized that was is preventing a major incident with me and my chair is my reflexes. Trust me, you don't want to bet on my reflexes.

Here is what happened, but it is not a never-before event:

I was walking Claren down a sidewalk, my right side nearest the street.

Sidewalks have curbs on them usually, no major bump, just like a fraction of an inch higher than the sidewalk proper.

As I went down the sidewalk -- slowly because Claren needs me to go slow -- the right front wheel touched the curb. It shouldn't have been a problem. The wheel should have easily bounced up it, and I should have just kept going.

Instead, the right wheel banged heavily on the ridiculously small bump, and because it could not flow up the bump, it caused the left side of the chair to swing right. So I was more or less on my way into the street. And at this point, the right wheel does bounce over the bump, so momentum has me headed into the street ... until my reflexes swung the chair back to the left.

This chair is crap.