I was scrolling through the enchantments in my table, trying to enchant 4 Iron Picks and 1 Iron Sword, And after about 15 minutes, (Which it took cause longer not only because I couldn't find many 40+ enchants, and when I did, they didn't apply) I finally enchanted the Iron Sword and Two of the Iron Picks. I closed the enchantment table and got some watermelons to eat, I went back, and on my first try I clicked on an enchantment that was level 46 for my third pickaxe, it enchanted, It was Efficiency IIII Unbreaking III, and it kicked me for flying.
When I logged back on, all I had were my were swords, my unenchantable items, and 2 of the enchanted pickaxes.
So just thought I'd post this.