Neons have issues with connections to the dashboard guage circuit board. That can result in occasional indicator blinks. My speedometer, gas, and temp guages occasionally drop to zero. Banging the dash brings them back. I'll fix it when it gets annoying enough or fails altogether.
Still, it being oil pressure, you need to make sure that 1) oil level is correct and 2) oil pump is functioning.
Its also possible that the screen over the oil pickup in the oil pan became briefly clogged. Unfortunately you need to remove the oil pan to fix that. A messy job that also requires you to remove a motor mount temporarily.
Bottom line, if it was a random blink that hasn't repeated, its most probably the dashboard issue.