Copyright 2004, Roadracing World Publishing, Inc.

A crash in which Jamie Hacking broke his collarbone brought testing to an early halt at Mid-Ohio this afternoon.

The test stopped at 4:25 local time when Hacking was transported in the only ambulance on site.

Jason DiSalvo, Roger Lee Hayden and Eric Bostrom crashed earlier, without any substantial injury–all three continued testing afterwards.

The rough, ground surface of the pavement played havoc with riders during the test, and proved especially difficult for the men on 1000cc Superstock machines.

Hacking was the fastest rider on a Supersport bike prior to his crash.