While making the publicity rounds for their upcoming "The Lake House," old pals Keanu Reeves and Sandra Bullock had a little fun discussing sequels ... most notably the possibility of a "Constantine" follow-up and a some high-spirited sour grapes regarding "Speed 2."

From ComingSoon.net: "As for her co-star, Reeves isn't quite sure what his next project is going to be, but Bullock had some advice for him when we asked about a "Constantine" sequel.

"I suggest you don't do that," she said sarcastically.

"What should I do?" asked Reeves.



Still bitter from doing "Speed 2: Cruise Control" and upset her pal didn't warn her not to do the sequel, she shot back, "I don't know, just as a friend I thought you shouldn't do a sequel, I'd call you or tell you. I think in the next 'Constantine' he gives up smoking. There's a whole anti-smoking campaign," Bullock laughed.

Reeves added, "It's kind of in the air. Maybe. I'd love to, but I don't know if the producers would want to do it... It's a long story. We've got to figure it out."