Our recommendation: Never try to take baby's stroller on the escalator at the deparment store. On Saturday morning, Rich tried this with RJ being not strapped in the stroller. RJ flipped out of the stroller and landed on his head on the escalator step.
Ambulance trip to the hospital. 2 stiches in RJ's forehead cut. Cat-scan (everything normal). 5 hours later RJ home but very cranky. Scary, scary day.
Lessons Learned.