[keefe]

Some friends recently showed me some pictures of me riding and I noticed that it seemed when I encounter a log, rock or other harsh impact my chain goes slack under the chain stay, I assume this must be from the lower part of the rear derailleur thrusting forward. I have a SRAM 9.0 Is this a common occurence?
I noticed my chain will jump to the smaller chain ring on occassion on sketchy downhills. Could this be the problem?

 

[shiggy]

Completely normal.