There is not so much movement in it... but keep in mind making a pirouette while roller- or ice-skating AND having long hair or a zz-top alike beard is not the smartest combination. It will make the audience scream, but not the way you like it:
http://www.unicyclist.org/cont/play.cfm?pi=f320240rollerskate-firebreathAlso keep in mind fire-breathing is besides dangerous also very unhealthy. The toxic in the liquid and in the smoke may cause cancer. Long ago I did an entire glass/nails/fire act for a couple of years, but now don't consider the effect worth the risks.
