Missing the toilet:
(1) darkened bathroom
(2) poor eyesight
(3) intoxication from drugs or alcohol
(4) travel (assuming the toilet is in the same place as at home)
(5) assuming the seat is down
Mobility problems limiting the person's ability to get on and off the seat:
(1) elderly
(2) lower limb paralysis
(3) hip and/or knee disorders
Causing the toilet to collapse:
(1) morbid obesity
Physical collapse of the patient when trying to get up:
(1) orthostatic hypotension
(2) cardiovascular disease
(3) epilepsy
Other possible types of injury:
(1) electrocution (from heated toilet seats or using a hairdryer while sitting)
(2) having the seat fall on the penis
(3) physical or verbal assault for failing to leave the seat down
(4) burns (if smoking)
(5) emotional distress (if out of toilet paper or someone walks in unexpected)
Modifications to reduce problems:
(1) Raising the seat height.
(2) Lighting the bathroom.
(3) Installation of handrails.
(4) Getting up slowly.