What would cause my oil pressure to drop as I strongly accelerate on the highway?

What is your question?

Happened a couple of weeks ago as I was traveling north on I-95. I accelerated rapidly to pass another vehicle and the oil pressure tanked. After passing and leveling out the speed, the oil pressure came back up to normal. Oil level is right on the money and changed about 1200 miles ago, along with a new filter. No noisey lifters or bearings. No leaks, just serious temporary oil pressure drop.

What makes this problem better or worse?