There are several "typical" stroller/wheelchairs accidents. Most of which can be relatively easily avoided.
1) Adult or child looks down as they are walking, sees the stroller or w/c, steps in front, and comes to a dead stop. Hello, these moving "vehicles" have inertia, they don't stop on a dime. Solution: Never knowingly step into the path of a stroller or wheelchair.
2) Groups of people walking that suddenly and unexpectedly come to a full stop in front of a stroller or w/c. If you
MUST stop your party to look at a map or discuss your next attraction, please move off to the side of the walkway.
3) Inexperienced w/c or stroller driver. Many people try to look around, seeing all there is to see, but not paying attention to what is directly in there path. DO NOT allow yourself to be distracted while pushing. Keep your eyes on the clearances between you and the party in front of you, especially in slow moving darkened areas, like EPCOT at closing.
4) W/cs & strollers parked for parade viewing. Do NOT allow your children or anyone in your party to "squeeze" in front to get a better view, unless unvited to do so by the occupant of the wheelchair. Chances are, you will misjudge your clearance, clip a foot pedal and either bruise yourself or stumble.
5) Do not try to rush by a wheelchair or stroller in a queue line, especially where the queue turns. These vehicles need that turning radius clearance.
6) On heavy park attendance days, be mindful of your surrounding, whether walking or pushing a stroller or w/c. I've had folks walk broadside into a perfectly stationary w/c.
7) It is true that many folks may never have used such a large stroller for their child, or used an
ECV. Accident will happen.
8) As stated in another post. NEVER let a child push a stroller or w/c in a park, that is an accident waiting to happen.
Remember, it is rare that the w/c, ECV or stroller driver is ever 100% at fault, just as the "walker" is usually 100% at fault. Drivers need to leave stopping distance, walkers should NOT step into that space. Type 1 is probably the most common accident.