Not bad. But, if you want some helpful suggestions here is what I can offer. I have shot more street protests than I can count. Been pushed around by protesters and gassed by police many times. Through it all, here are the things I have found make or break street protest photography:
First, get right into the middle of the action. Put your long glass away for the protest and get your wide angle out. I shoot most street protests with my 28-70mm on one camera and my fixed 14mm on the back-up. The wider you are the more you will be forced to get right in the middle of the action.
Second, get low. Too often people shooting street protests forget the power composing the image from down low can offer. The excitement of the moment keeps people on walking and their shots tend to be mostly at eye level. Get down low, around people's knees and waist and then shoot up on them. It gives the photos the effect of being totally surrounded by the action (again use a wide lens).
Thirdly, and this was something my first photo editor taught me, "Faces, faces, faces!" Street protests usually offer an excellent opportunity to capture emotion in people's expressions. They are protesting for a reason and it rarely is because they are happy. Most of the time, they are angry. Therefore, they are yelling, screaming, spitting, etc. etc. etc. Get in close and really capture that emotion.
At the end of the day, it's the emotion of the protesters that makes street protests interesting, not the fact that there a bunch of people gathering in the street.
Fourth, following up on number three, have a couple of shots where you fill the entire frame with someone's face who is exhibiting a ton of emotion. Those shots (filled frame, face, emotion) are 100% of the time what photo editors choose to run on the front page the next day. The shots of a couple hundred people in the street are passed on.
Finally, when police arrive, put yourself in the position of being in the middle of the action when they clash with protesters. If a policeman is getting ready to hit a protester with a club you should be right there so you can grab a frame where the cop is one side and the protester on the other with nothing else in the foreground. Or in other words, anticipate the moment because during street protests they are bound to happen... it's always just a matter of time.
That is my two cents.