Trail Renderer Not at all accurate.

Hi all. I'm trying to create an effect where a line is generated behind a flying object. Something that would look like this:

[video=youtube_share;_24FQrWv5vQ]http://youtu.be/_24FQrWv5vQ?t=17s

Sounds like the perfect job for the trail renderer, right? The problem is, even with Min Vertex Distance at 0, my character, moving at about the same speed as i the video, seems to be moving faster than what the trail renderer can keep up with, so from the camera's perspective I see what it looks like a straight line twitching like crazy.

Any idea why it won't be accurate enough or how it could be?

Thanks.