A
bumbling taxi-driver who frequently runs into things, takes a
wrong route, shows up at the wrong address, forgets where he's supposed to be transporting his riders, drives jerkily and/or over rough terrain so that his passengers get
jostled around, etc.
Private ride-services are notorious for screwing up or otherwise
delivering below-acceptable performance/service, so one has to wonder how many MacGrUBERS are behind
the wheel of those
errant hacks!