I wondered abit about Beloki and LA too but the attack was already well initiated by Vino and the counter by LA and Beloki was also in progress when the crash happened too. If LA hadn't been forced off the road I do think he should have, and probably would have, slowed and looked back. Vino's attack was a bigger threat to Beloki's spot than Lance's.
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“Life is not one damned thing after another. Life is one damned thing over and over.”
Edna St. Vincent Millay