Because Walmart likes to release its most jaw-dropping TV deals as a handful of pre-meditated doorbusters, more shoppers will be waiting in the wings for the clock to strike a certain time (rather than calmly perusing several pages of TV deals) — which means TVs selling out is more likely and time is of the essence.

Walmart has this 50-inch 4K Roku TV on sale in one of the best deals of the holiday season. Here's the deal that you can only score during its "Black Friday Deals" sale.