The ability to think on your feet is a highly coveted skill for many employers. Taking an improv class can help you get better at coming up with outside-the-box ideas on the fly, but don’t focus so much on spontaneity that your answers fall short in the substance department. Try to express something that makes a positive impression and shows that you’re a great fit for your target employer, like unique internships or work experience that’s relevant to the position at hand.
Also, feel free to have an answer at the ready to deliver in a spontaneous-sounding manner. Perhaps there’s an interesting anecdote you can highlight about taking a leadership role in your current job, or something else that speaks to your credentials as a job candidate.
If you’re still stumped, don’t worry: silence can be your friend too. Even though two seconds may feel like two hours to you, interviewers usually expect some silence—and quite honestly, not enough job seekers embrace it.