a public disturbance
"the police investigated an incident at the bus station"
a single distinct event
(sometimes followed by `to') minor or casual or subordinate in significance or nature or occurring as a chance concomitant or consequence
"the road will bring other incidental advantages"
"extra duties incidental to the job"
"labor problems incidental to a rapid expansion"
"confusion incidental to a quick change"
falling or striking of light rays on something