Apparently not only is Nanotyrannus valid again according to a recent paper, but also a second new species of it has been named. So, have some Nanotyrannus lethaeus running animation.

Peloroplites 3D sculpture for the Primordial Tyrants modding team in Path of Titans

Horrid Child

Adult Tyrannosaurus Run Cycle

Juvenile Tyrannosaurus Walk Cycle Animation

Hell Creek's deranged little Imp

Allosaurus Run Cycle Animation