On this part: http://www.thingiverse.com/image:57507
You can see some damped oscillations after the logo. I made this thing to try to get a better look at them.
The photos were taken of a part built on MiseryBot which has a lowrider.
Printing was at 40mm/sec
Someone with mote math skilz than me might be able to draw some conclusion as to what the waves mean.
Just print and look at your output. Tweak and repeat!
You will want to turn cool off, so it hits the bump at full speed, or use orbit.