The extreme and sharp sensation of mortal peril gripped Lex's heart, causing him to freeze lest a single movement provoke an irredeemable accident. Let alone move, he even halted his breathing and subdued his own heartbeat so that his presence would cause menial changes to the environment.
For the first time in a long, long time Lex felt the scent of death surrounding him. Whatever was in those barrels was exceedingly dangerous, and even the slightest exposure would outright kill him! There would be no steady decline, no time for retreat and treatment. It would be instant death. At least, that is what his instincts were telling him.
In fact, even sealed in those unassuming wooden barrels, whatever was inside seemed to be affecting Lex's health already. He felt his stomach lurch and grumble and an unbearable pain began to develop in his lungs.