:11 was the sickest shot in the edit for sure. I noticed a lot of blur in some of the shots. Like soulcrew stated, crank up the shutter speed. On a super sunny day, I normally shoot at around 1/1000 when i know i'm using twixtor.
Yeah, I've just noticed that sometimes it really helps with the motion blur. One other thing many forget to do including my self is to change the setting in twixtor from 29.97 to 59.97 since thats what you most likely were shooting in. That will help it smooth out sooooo much as well.