Venom:
Guess they had more than one pack to play with.
My take on it is that its an interesting concept, though kinda unnecessary really; if you were to run a decent 6s 30C 5000mah lipo with the BL system, you could ( on paper ) have a setup capable of around 3.7kw peak poweroutput- far higher than the nitro engine and undervolted motor ( 3s, seriously? ) running together. Using the nitro to supplement a fully powered BL system might be interesting to try and boost max power, but to use a half powered BL system... nah.