Before Sam got sent back in time to Ancient Egypt, he was involved in numerous missions all over Earth where Mentals minions were involved.
One such time was where Sam was just returning from one of those missions. As usual he prevailed and took off back to base in an F-16 fighter jet, an old relic of the 20th century that unfortunatly he had to take from the local museum, so it wasn't armed, as his own craft was destroyed prior to landing at the LZ of his mission.
On his journey back to base, an encounter with a Remote Mental Controlled (RMC) F-16 fighter jet leaves Sam's jet in a bellowing plume of flames and smoke, ejecting only seconds before impact, Sam now is only armed with his trusty Shofield's and a combat knife. So now Sam 'Serious' Stone has yet another mission to accomplish, to find out where he is and how to get back, but Mental will probabbly have other plans for him, so watch your back...