[i]That's oil pressure in atmospheres. [/B]
It's actually the oil pressure in "bar". One bar is equal to about 14.5 psi, which is a little less than one standard atmosphere of 14.7 psi.
It is not necessarily abnormal for the level indicator to illuminate after a "spirited driving", especially if the level is a bit low.
Get the oil level to the full mark and see if it occurs.