flash and high cpu usage

Hi there,

I have a 2.2 ghz macbook with 4 gigs of ram.

I work for a flash gaming company so i'm constantly browsing the web and playing flash content.

I like to play games and look at the cpu usage safari is using in activity monitor. Since I've had my macbook, playing a game such as fancy pants adventure 2 (which is an excellent game btw!) uses about 33-40% of the cpu.

Today I looked at it and the same game is taking up 100% in safari! Still the overall idle cpu goes anywhere from 40-50%.

I tried restarting my computer but still seeing the same thing. What would cause the jump from 33% to 100%?? I'm confused