Cornfield sightings are interesting because crops act almost like a canvas for whatever's going on - you get displacement, flattening, sometimes scorching depending on the event. Worth going back out in daylight and checking the field properly.
Few things worth noting if you do that: look for any dead or blackened patches at ground level, unusual smell (metallic or burnt), and whether any animals are avoiding the area. My main thing with SHC research is that a lot of the same thermal signatures and electromagnetic weirdness crops up across different phenomenon types, so its worth documenting carefully even if it doesn't fit a neat category.
What height would you say it was hovering at roughly? And how long did the whole thing last?