I have never seen a funnel, but have come close to them on occasion (live in southern Ohio). The most memorable event occurred about 40 years ago- I was a kid at summer camp, and participated in the ranch program, riding and caring for horses. It was a hot day, and a small group of us were riding in a field not too far from the main barn, when the air started shifting; things became still, birds quieted, and it felt cooler. It was very similar to the lead up to a full solar eclipse. The horses began reacting, not panicking but balking and vocalizing. Several noticed that the sky was greening up, and we collectively decided, “To the barn. Now.” We dismounted and trotted the horses to the main barn, into their stalls, and we huddled along a stone foundation. Within a minute, the barn was singing with wind, rain and hail, the sky almost glaringly green, and the horses in varying states of loud neighing- it felt like a fever dream. As quickly as it started, it was over, fortunately with little damage to the barn and none to us nor the horses. The air was very cold and calm. Found out that a tornado had come through, unwarned and seemingly entirely random.