He said a man in the seventh row in a " brown suit raced past me with his hands raised in the air " armed with sharp stakes .
Mr Charlton was in the third aisle when a man in a brown suit raced past him with his hands in the air , armed with the stakes .
Shares in Tellabs were up 16 cents , or 2.2 percent , at $ 7.34 in morning trading on Nasdaq .