The camera follows a path inside the tunnel, but after each turn, kind of snaps back or bumps, like a recoil of sorts. I reduced the size of the turns, but it still happens. I put on a damped track which seems to help, but the only reason it looks kind of decent is because the camera is set to 15mm. The other issue is that when it's rendered, the tunnel lights keep on shifting hues, even though I have the same point light duplicated within. Here's the file. Any ideas?
Shift+A
> Curve > Path or in Edit Mode convert your curve to NURBS withShift+T
or from 3D View Menu > Curve > Set Spline Type $\endgroup$