Jessa and Jinger Duggar paid a visit to Chicago for a music seminar on Tuesday's episode of TLC's 19 Kids and Counting, and while in town, they visited the sky deck on the 103rd floor of the Willis Tower (formerly known as the Sears Tower), where they got a tad squeamish at the jaw-dropping view from above.
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The girls were frazzled by the great heights of the building, especially Jinger, who said she "seriously cannot bring myself" out to the see-through floor of observation deck, perched high above Chicagoland.
"Literally, you walk out and you feel like your falling," she said.
Still, she braved the great heights and ventured out onto the deck for a second, seeming very relieved to withdraw back into the building at first chance.
"I seriously could not bring myself out there -- it made me sick just thinking about it," she said.
The episode also featured dad Jim Bob rounding up the troops for a family car wash.
19 Kids and Counting airs on TLC on Tuesdays at 9/8c.