The antivirus server at work was pissing me off and saturating our OC3.  I policed it down to 50mbps.

ip access-list extended traffic-police
permit ip host 192.168.0.100 any

class-map traffic-police
match access-group name traffic-police

policy-map traffic-police
    class traffic-police
        police 50000000 conform-action transmit exceed-action drop

int po1/0
service-policy output traffic-police