There is a tradition in Rome on Pentecost Sunday. At the Church S. Maria ad Martyres, the Pantheon, at the end of Mass red rose petals are let fall in great abundance through the oculus, the dome’s "eye" which is completely open to the sky. Fireman from Rome’s fire department scale the exterior of the dome and let the petals fall.
Here are a couple shots of what it looks like inside the Pantheon when they do this.
Here is how the get it done!
Hangin’ out, waiting to drop the flower petals…
The moment arrives!