Animator Robert Medina recreated the 11th Doctor’s regeneration from the Doctor Who episode “The Time of the Doctor” in the style of LEGO. The episode was the finale of season seven, and marked Matt Smith leaving the show after playing the Doctor for three seasons. In the scene, Smith’s 11th Doctor regenerates into the 12th Doctor played by Peter Capaldi, or in the case of Medina’s recreation, a LEGO version of Smith regenerates into a LEGO version of Capaldi
For comparison, here is the original regeneration scene.
via Mighty Mega