Doctor Who: 14 Cool Details Revealed In David Tennant's The End Of Time Part One Commentary
7. David Tennant Fell Over While Shooting This Running Scene
It simply isn't a Tennant-era episode of Doctor Who without a bit of running, and sure enough, The End Of Time Part One fulfils that requirement early on.
There's a scene where the Doctor chases the Master across a wasteland - which concludes with Wilf finally tracking the Doctor down - and according to Tennant, this particular scene was quite painful to shoot, because he hurt himself while doing it.
More specifically, Tennant says that he "fell over" while filming the above shot, mainly because the terrain made it difficult to keep his footing.
Those Converse probably didn't help either...