Motorsport legends Lewis Hamilton and Valentino Rossi swapped rides earlier this week at Valencia for a track day of mutual fun and exploration.
Regardless of the number of wheels, the Mercedes driver and the Yamaha rider took to each other's machines with speed and style.
Check out the gallery of pictures of the two titans encounter, courtesy of Monster Energy.
VALENCIA, SPAIN - DECEMBER 09: Atmosphere during the #LH44VR46 test at Ricardo Tormo circuit of Valencia on December 09, 2019 in Valencia, Spain.
Lewis Hamilton and Valentino Rossi swapped their respective machinery in an unprecedented test between two motorsport icons.
Photo by Guido De Bortoli/Getty Images for Monster Energy)more
VALENCIA, SPAIN - DECEMBER 09: Atmosphere during the #LH44VR46 test at Ricardo Tormo circuit of Valencia on December 09, 2019 in Valencia, Spain.
Lewis Hamilton and Valentino Rossi swapped their respective machinery in an unprecedented test between two motorsport icons.
Photo by Guido De Bortoli/Getty Images for Monster Energy)more
VALENCIA, SPAIN - DECEMBER 09: Atmosphere during the #LH44VR46 test at Ricardo Tormo circuit of Valencia on December 09, 2019 in Valencia, Spain.
Lewis Hamilton and Valentino Rossi swapped their respective machinery in an unprecedented test between two motorsport icons.
Photo by Guido De Bortoli/Getty Images for Monster Energy)more
VALENCIA, SPAIN - DECEMBER 09: Atmosphere during the #LH44VR46 test at Ricardo Tormo circuit of Valencia on December 09, 2019 in Valencia, Spain.
Lewis Hamilton and Valentino Rossi swapped their respective machinery in an unprecedented test between two motorsport icons.
Photo by Guido De Bortoli/Getty Images for Monster Energy)more
VALENCIA, SPAIN - DECEMBER 09: Atmosphere during the #LH44VR46 test at Ricardo Tormo circuit of Valencia on December 09, 2019 in Valencia, Spain.
Lewis Hamilton and Valentino Rossi swapped their respective machinery in an unprecedented test between two motorsport icons.
Photo by Guido De Bortoli/Getty Images for Monster Energy)more
VALENCIA, SPAIN - DECEMBER 09: Atmosphere during the #LH44VR46 test at Ricardo Tormo circuit of Valencia on December 09, 2019 in Valencia, Spain.
Lewis Hamilton and Valentino Rossi swapped their respective machinery in an unprecedented test between two motorsport icons.
Photo by Guido De Bortoli/Getty Images for Monster Energy)more
VALENCIA, SPAIN - DECEMBER 09: Atmosphere during the #LH44VR46 test at Ricardo Tormo circuit of Valencia on December 09, 2019 in Valencia, Spain.
Lewis Hamilton and Valentino Rossi swapped their respective machinery in an unprecedented test between two motorsport icons.
Photo by Guido De Bortoli/Getty Images for Monster Energy)more
VALENCIA, SPAIN - DECEMBER 09: Atmosphere during the #LH44VR46 test at Ricardo Tormo circuit of Valencia on December 09, 2019 in Valencia, Spain.
Lewis Hamilton and Valentino Rossi swapped their respective machinery in an unprecedented test between two motorsport icons.
Photo by Guido De Bortoli/Getty Images for Monster Energy)more
VALENCIA, SPAIN - DECEMBER 8: Lewis Hamilton and Valentino Rossi swap their respective machinery during the #LH44VR46 test on December 8, 2019 in Valencia, Spain. (Photo by Guido De Bortoli/Getty Images for Monster Energy)more