Has Anyone Ever Overloaded Midi..., system buzz pop and fizzle Options

[miaba]

Has anyone ever "overloaded" their computer by using a usb connect keyboard controller? By that I mean playing notes rapidly for about a minute until the system emits a wierd buzz then completely cuts out any incomming midi information or previosly recorded audio. This isn't a hobby but it happened last night. Has anyone found a suitable way to avoid this? I'm using a powerbook with logic pro. I also ran into a problem with midi audio synch after using a decent amount of plug-ins/instruments. Any input would be considered good!