@metrompg, that is a Semtech portable emissions tester used for the measurement of CO, CO2, NO, NO2, THC, NMHC, CH4, NH3, O2 and Particulate Mass. The emission tester was attached to the tailpipe, we would drive around the track doing HARD accelerations and HARD stops to simulate everyday driving, fun fun except when a dump truck pulls in front of you
I think that the testing people were more afraid of losing the tester.