Probably one of the coolest
Probably one of the coolest things I ever saw was an exhibition between Zero and Quantaya on the motocross track. Seeing those silent machines high-flying and hearing the crowd reaction was awesome.
Of course, nothing beats the KillaCycle doing a burnout with nothing but a high whine like a jet engine working its way up to ignition. Then seeing Scotty somehow hold on while the huge G-forces kick in and he does 0-60 in less than a second.