The skies over Houston are brooding this weekend, threatening to open up with heavy, tropical downpours and the low, rolling rumble of thunder along the I-10 corridor. But the slow-moving front stalling near the Gulf Coast isn't the only storm brewing. There is a grand chess match being played on the gridirons of Texas, and as the rain falls on TDECU Stadium this Saturday morning, the Cougars will attempt to capture lightning in a bottle. That lightning goes by the name B.J. LaFell. The crown jewel out of Shadow Creek High School arrives in the Cougars' backyard as a sophomore phenomenon with…