THE TESLA ROAD TRIP - We check out the views atop Chicago's Willis Tower and, back on the ground, 'summon' the Model X to us

Video producers Graham and Will are on an epic road trip from San Francisco to New York City.

In episode 6 of a seven part series, the duo wakes up in Chicago and head up to the top of the Willis Tower. Heading east in the Model X, they test the "Summon" feature and watch the car set off on its own. Plus, in the interest of science, Graham debunks his own personal myth about charging in the rain.

Day 7: 469 miles

WATCH: Things get stressful as the Model X hits 1% battery power.

Click here to watch the entire series.