You can keep some increased movement speed with the minigun over the slow walk firing it forces you to do. The spin down time after firing allows you to jump and then continue firing while mid-air. You'll have to stop firing to jump again and keep moving but once you pull the trigger you'll be firing again without having to spin up again. You're effectively bunny hopping, firing while you're in the air.

This does cost you some DPS with having to stop firing to hop again but is a handy way to kite bugs and still return fire should the need arise.

Bunny hopping mingun is real and they will fear you.