Caution to all cans and any other objects thrust into the line of fire during Serena Williams' practice sessions: Buckle up.
Watch the world No. 1 show striking power and accuracy knocking down these tennis ball cans down in a stirring target practice.
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Williams is so explosive she cracks two cans with one serve, nearly knocks the top off of another and then, in a freaky conclusion to a superb serving target practice, she hits the final can standing off a net cord.
Would you place a tennis ball can on your head and allow Serena to try to knock it off with a serve?
Photo credit: Internazionali BNL d'Italia