nice, congrats.
protip for the future:
if you're in a situation and you know your camera won't keep up, wait until your subject is on a 90 degree line in front of you to take the picture. keep your camera moving with your subject so that it stays centered on the spot it was in when exposure started. this will blur the background but not the subject. its called panning. see picture four (yours) for reference.
protip for the future:
if you're in a situation and you know your camera won't keep up, wait until your subject is on a 90 degree line in front of you to take the picture. keep your camera moving with your subject so that it stays centered on the spot it was in when exposure started. this will blur the background but not the subject. its called panning. see picture four (yours) for reference.