I have heard this activity humorously referred to as "puppy fits". It seems to occur in all breeds, not just Rotts. Actually, I've seen the same thing occur in kittens, baby rats, guinea pigs and my own daughter.
http://www.rottweiler.net/rottie/smile.gif I think it's just youth.
My dog is quite a mature almost 5 years old now, but she still has one or two "fits" a year. Thankfully, they usually take place outside on a cold day in winter and now I just love to see her running around like an idiot pup again.
http://www.rottweiler.net/rottie/smile.gif