Physics in the 'Whoniverse' seems to be a bit off as of late. We have bullets creating sparks, bouncing off windscreens and a lot of explosions. But even in the older days you would frequently see ships exploding in the vaccum of space. I would like anyone to suggest bad physics they have seen in doctor who,or try and justify them.
P.S In 'Pyramids of Mars' Sarah Jane blew up a box of gelignite with a period hunting rifle, is that possible???