Final approach speed for this type of a/c is about 130-140 kts. Just before touchdown the power input is normally relatively low. A bag INSIDE the hold would not be sucked into the engine. At full blast a jet engine will suck in anything close (tables available, re distances etc). Bags fell onto the runway upon landing, which is quite likely considering how the DC-9/MD-80 touches down.
Relax. And give my regards to mr. Newton when you get through to him.
Nobody here will apparently answer my questions… Still curious.