Tribophysical waveform macro-kinetic extrapolator
Basically a 'pan-dimensional surfboard'... but if you want the techno-explanation, it is: An interstellar transportation platform that utilities massive energy to create a force bubble that protects the rider while riding the shockwave to its destination.
Something which both the ninth and tenth Doctor's express a fondness for.
'I like bananas. Bananas are good'
Doctor: Go! Now! Don't drop the banana!
Jack: Why not?!
Doctor: Good source of potassium!