I don't know what a klaptish is, but I've noticed one thing. Some objects are designed so that you can put other things on top of them, without falling through. Certain tables have this function for instance. Otherwise radios and other stuff would just sink to the floor after being setPosed. Now, if you try to set a brittle object like a radio on such a table, and miss the height by a fraction of an inch, so that the radio is partly inside the table, the radio will sometimes fly away in arandom direction. Try setPosing the object a couple of inches above the surface, and it will usually sink down to the ciorrect position. I noticed this in OFP. Don't know if it's still a valid observation in ArmA2.