While scientific research on the subject is sparse and inconclusive, I believe (and if I do, you should, too) your plants will immediately think its night and also come to the conclusion that winter is near. This will trigger two responses. Photosynthesis will stop. It's unclear if the chlorophyll will leach from the plant. If it does, then there's a risk of transition to vampire plants. Second, since plants have one purpose, flowering and seed production will be accelerated by the perceived shortened day. We know this as the photo-period. The practical result will be the massive production of soybeans, turnips, clover seeds, rye grain, oats and other seeds, fruits, and vegetables. Be especially careful of Daikon radish. The North Koreans may mistake them for missiles aimed at their country. The temptation to be observing your food plots when this happens is great. However, caution would dictate you be far away. Trust your trail cameras to record the event. Never look directly at an exploding brassica. We all know this is a temporary event. Plants, though, having no mind of their own will misinterpret the circumstances. The results are described above. When the full sun reappears, the plants that have mostly exhausted their life-cycle resources anyhow will immediately commit suicide. Be ready to replant tomorrow. Best you go buy more seed today BEFORE anyone else realizes what a catastrophe of epic proportions will soon be on us!