ZOmb- the sketch would look much better with a simpler F.notice the other letters you have dont have the same kinda extensions/style, ie the horizontal lines of teh f. Also, it would look much better with a solid consistent width instead of the big to small to big effect the letter bars have.
Just curious are not there gaps on the side underneath as well a in between the tracks and the train. I have heard of a dude who jumped ontop of a dude who fell to save his life.