I broke the network :(

During the process of mass installing the plug ins the network froze up and went down and displayed this message:

Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 300983 bytes) in /home/rmandm/public_html/wp-includes/functions.php on line 251

If you have info to help resolve this problem that would be great.

Thanks.
-Ryan