He was an employee at the Hyper Cacher supermarket who managed to get about 15 people into hiding during the hostage taking and subsequent siege:

As the authorities in France worked on Saturday to piece together the sequence of events at a kosher supermarket in Paris where a gunman and four hostages were killed on Friday, there was an outpouring of praise online for a young employee credited with saving the lives of some customers by hiding them in a cold-storage room.

The employee, Lassana Bathily, 24, was identified in the French news as a Muslim from Mali who worked at the supermarket, Hyper Cacher, near the Porte de Vincennes in eastern Paris.

………

When the people he had hidden came out at the end of the siege, Mr. Bathily said, “they congratulated me.”

“They said, ‘Really, thanks for thinking of all these ideas.’ I said, ‘It’s nothing, it’s life.’ ”

It ain’t nothing.

You kept your head, and helped a lot of people.

It is a big deal.