Possible Clues:

• Blows volcano-style
• Spews lava, say
• Emulates Etna
• Loses one's temper when the rest, running, catch up
• It comes out and comes up to keep the street clean
• It's the turn of the saint that's blameless that's blowing his top
• Flares up
• Breaks through, achieving backstreet clean-up
• Blows, volcano-style
• One blows one's top like this