Memorial Bridge Portal

As wee reached the center of the bridge my friend and my daughter were looking our over the bridge (looking north) and suddenly told me to “look at that!” There was a bright white light hovering midair pretty much lined up with the bridge about half a city block out from the bridge itself. This light was roughly 5 feet in circumference and as our attention was directed at it, it started opening up in the center. my first thought was “omg that’s a wormhole! a dimensional portal!” It kept spinning and expanding til it opened up roughly 4 times its size,