Some see 5.0 seconds a possibility. Because 6' 5 Usian Bolt broke the mathematical model that had fit 100-meter record data for almost a century, his incredible performance has reset the bar for how fast researchers believe humans ultimately can run.
Lobsters may eat other lobsters in captivity, but this has not been observed in the wild. It takes an American lobster 6-7 years to get to an edible size, but that is just the beginning. Lobsters are long-lived animals, and are thought to be capable of living over 100 years.
There are two things in particular to avoid in order to keep your lobsters alive until you are ready to cook them: heat and dryness. Keep your lobsters in a cold, damp, and suitably oxygenated environment and you can expect them to survive for approximately 36 to 48 hours after you bring them home.