Detachable Warthog Gauss Cannon Bug (Halo: Reach PC)

We were just playing through the campaign on legendary and this happened.
Detachable Warthog Gauss Cannon Bug (Halo: Reach PC)
Detachable Warthog Gauss Cannon Bug (Halo: Reach PC)
Detachable Warthog Gauss Cannon Bug (Halo: Reach PC)

Reach