It's that time again! Jim Cramer rang the lightning round bell, which means he gave his take on callers' favorite stocks at rapid speed:
Nike Inc.: "I think it's going to be multiple quarters before they are able to break out again."
Kratos Defense & Security Solutions: "Oh, it's been one of our favorites. We almost cautioned double right now and I want to stay long."
FibroGen Inc.: "Oh, boy. That is extremely speculative. As long as you're doing it with a little bit of money that you know you can lose, because the company itself has no earnings. For me, don't buy."