Incident Overview
A certified flight instructor (CFI) was providing multiengine instruction to a student. According to the CFI, all basic single-engine and multi-engine maneuvers had been completed prior to the incident.
Approach and Touchdown
To simulate a single-engine landing, the CFI reduced power on one engine. A normal approach was flown. On touchdown, the aircraft landed "a little long and fast." The left main landing gear touched down, and the aircraft began porpoising.
Go-Around Attempt
The CFI called for a go-around. During the go-around callout, the landing gear warning horn sounded. The CFI took control of the aircraft and attempted to execute the go-around. While doing so, the right propeller struck the ground. The CFI then reduced power, and the aircraft skidded to a stop on the right side of the runway.
Outcome
The aircraft came to rest off the runway. No further details about damage or injuries were provided in the source.