If a google search is attempted that is too many words, it produces the message "... (and any subsequent words) was ignored because we limit queries to 32 words."
If it is even longer, eventually it only gives you an error page saying "413: That's an error. Your client issued a request that was too large. That's all we know."
Is there a query length that could cause it to simply break? (1GB? 100GB?) How is an attack like this prevented? A malicious user might modify the metadata to show a misleading data size.