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STORY: Uber's second-quarter results beat Wall Street estimates, sending the company's shares up as much as eight-and-a-half percent in Tuesday morning trading.

With more people returning to offices - as well as traveling, dining out and seeking other experiences - ride-sharing has gotten a boost.

Or, as Uber CEO Dara Khosrowshahi put it: "Mobility had a standout second quarter...."

The company's revenue rose 16%, while gross bookings increased 19% - both above analysts' expectations.

Uber also benefitted when some people chose to stay in.

Its delivery business revenue - which includes Uber Eats - also beat estimates.

And trips by self-driving vehicles on Uber's platform were six times higher in the quarter, helped by partnerships with companies such as Alphabet's Waymo.

Shares of Lyft also rose... with the Uber rival expected to report its results on Wednesday.