That's a big big dive! How's he doing now? I think with this one you're going to have to test earlier...he's going to need for you to 'get your guard up' so to speak. I would love to have seen a 1+ to know how much he went down at that point...then a 2+ to confirm the drop. I typically get out the MC when Luci drops 100 points or more between tests...as you can see from our SS I rarely go more than 2+ without getting a test...she has a history of making the big moves...you may have a diver on your hands...
It could be that the depot is full...time to be extra vigilant...