Maybe he was walking and there was a needle on the floor with synthol, and by accident he tripped, and both his arms fell on the needle filled synthol, and he had no idea what it was. A likely explanation.
Yep, this happens in gas stations across America.
the likely scenario---he staring at an old pic of Greg Valentino and a quart of Valvoline 5w-30 in the back, and develops this idea of shooting up oil into his arms...