Oh man! How much of a mess did that make?
Thankfully it wasn't terrible. One was a 5F nuc, one was a 10F single, and one was an 8F deep with 2 supers. Nothing broke, no combs got gouged, just sorta fell on their side and boxes separated. I went through them 2 days later and all was well. I was mowing in shorts and a bee jacket and when it first happened I jumped off to get them put back together right away, but after about 20 stings in the legs I went to the house to put on jeans.