Possible Clues:

• Blood clots
• Coagula
• Engineered mobile obstructions to flowing artery
• They block mobile, self-descriptively?
• Clots obstructing blood vessels
• They block the arteries from dodgy mobile
• Blood-vessel blockages
• Obstructions in blood vessels
• Blocks in east M51 -- it's a stinker being caught there
• Clots