Other mistake: During the quake, we see the furniture, wall panels, ceiling tile, windowpanes, vertical blinds, etc., in the office fall, shake, or crack. Yet the leaves of a large potted plant do not move at all.
Other mistake: Outside of the office building, Stewart and Remy take shelter under a vehicle, despite falling debris crushing vehicles in their midst.
Answer: That has been a question of debate for years. Some say he died, others say he lived. The only real answer I can give is, there were talks of making a sequel. In it, Lou and Maria were living in San Francisco, while Miles and his partner were headlining his motorcycle act in Las Vegas, when another, stronger earthquake hits.