Sphaerobolus stellatus (Cannonball fungus)

Sphaerobolus is a genus of fungi in the family Geastraceae. Commonly known as the “shotgun fungus” or “cannonball fungus”, species discharge their spores with explosive force. Discharged spore sacs are sticky and have a tendency to strongly adhere to whatever surface they encounter, making them a nuisance to homeowners, pressure washing contractors, landscape mulch producers and insurance companies.

— Wikipedia