While in Wilmington, NC, we went to the Burchetta Glassblowing Studio and Gallery, where they give demonstrations and even lessons on blowing glass. Unfortunately their furnaces were down for maintenance, so we didn't get to see any glassblowing. So we looked at their gallery, which has many nice pieces.
In this picture, direct sunlight is coming into the gallery from the opposite direction and shining on/through the glass pieces. It was so bright that it effectively blinded everything else in the picture. This effect was not done via post-processing.