When the 'Check in's are very busy at PMI (Sat) evening, Some bags end up getting just thrown onto the conveyor, Without the correct weight reading.
Sat is 'Murder' at PMI's terminals, With the Airport handling hundreds of flights, And pax rushing thru the security checks etc.
And some Large bags & puschairs etc are carried thru as 'hand Baggage'
Iv'e seen it done.