I call those things a Slinkey. Ya know, like the toy we played with as a kid. They go real fast like, then slow down to a stop real fast like and repeat the thing again through many cycles. The Harley bunch up front usually take off and get up to 80 then it's brake lights and blue smoke.
I just got back from a nice peaceful solo ride in the N. Ga. mountains. I was my own Slinkey.

2005 Model . Two Fast Eddy stickers , a bell and a clock . She's Lola . She tinkles and keeps time . http://s649.photobucket.com/albums/uu211/britbike05/