I called IT. They are going to send a tech out to read the black box.
I suspect one of the following happened:
1) I don't know if this is possible, because I don't understand how this sort of thing works, but I'm wondering if when I was stuck on the threshold and holding the joystick forward, if it had that forward command "stored up", and so when it finally did get over the threshold it kept going. As for why it turned to the right instead of going straight forward, maybe I had been pushing it a bit to the right.
2) Maybe the joystick got stuck. It doesn't appear to be sticky. I know for sure I did not have my hand on the joystick after clearing the threshold. One time my grandma was backing out of her driveway and she swears she had her foot on the break, but she must have had it on the gas. She ended up crashed into the neighbor's house accross the street. I know I didn't have my hand on the joystick though because I was trying to grab things.
3) It's possible the the dog leash caught the joystick and was pulling it forward. I don't think this is what happened because I'm sure I dropped the leash as soon as I knew I was in trouble. Perhaps it snagged it though after I let go. But also, the dog wouldn't go to the right. Whenever we leave the house, we go to the left, so it makes no sense.
4) A person who uses an iGlide wrote this after she read about what happened to me: "I'm very interested in hearing what the iBot folks have to say. I had some malfunctions with my first iGlide (far more comical than serious -- the chair started going in circles backward at top speed), which all ended up being caused by people nearby using the pager function on their cell phones. Is the iBot also sensitive to cell phone towers, signals and such?"
Out of those 4, I'm thinking #1 caused it. #2 would be my second choice.
It was extremely scary. I was very calm right after it happened and the ladies who picked me up commented on that. But then I got inside and started crying and shaking. I cried for about 2 hours. I think that was partly due to the fact that it was terrifying, and partly due to the fact that I knew I could have been hurt badly but I somehow got away with minor injuries. I don't understand why the iBOT did not land on me, but if it had, it could have been disasterous. The thing weighs nearly 300 pounds. I'm fairly small and I weigh about 90 pounds. It seems to me that when the casters went down that first step, it should have tipped over forward and tumbled on top of me. As much as I hate the footrest system because it sticks out so far, I think it prevented it from tipping over.
Will I stop using the iBOT? Absolutely not! I still love it. I don't know if it malfunctioned or if the dog leash caught it. Even if it did malfunction, continuing to use the iBOT is worth the risk. Driving a car is quite risky, but I won't be giving that up either. I will just try to be extra careful when around stairs. I will also start thinking about how to get out of the chair if I'm ever in that situation again. I should have flipped my armrest up and then thrown myself out of the chair. That is what I will do next time, if there is a next time.
One more thought... the iBOT is really powerful. I'm sure it has to be powerful for the 4-Wheel Drive Funtion, but I'm wondering if it could be made so that it is not so powerful when in Standard Funtion? I know it has Speed 1 and Speed 2, and I suppose I should have been in Speed 1 until I got to the sidewalk. It seems to me that Speed 1 is very powerful, but at the same time, it is too slow. This is the only powerchair I've ever had, so I don't have anything to compare it to, but I've always thought that the power was a bit too much.
EDITTED ON MAY 22nd TO ADD:
I'd just like to say that I do not believe the iBOT malfunctioned when it when down my porch steps. I believe it was 100% user error. On top of that, I was very impressed that the iBOT did not tip over, and was in no way damaged.
I'd also like to say that although my wrist still hurts at times, I would take my iBOT and a wrist that hurts for the rest of my life over a painfree wrist and no iBOT.
