On Yahoo Finance I have noticed quite interesting option activities:

• 18th of September - there is a out of the money $10 call with almost 3 thousands contracts. That is quite unussuall, considering, that up till now, contracts were in low hundred.
• 16th of October is even more interesting, 11k out of the money position, split among $10, $12 and $15, the last one is over 6k contracts.

The price for those is not exactly cheap, like $.80 for a $15 call on 16th of October. IMHO, there is no reason for LAC going to $15/share at the moment. However such position can initiate a rally, so the only conclusion is that somebody is having fun while pushing the LAC price artificially higher.