Who wouldn't be nervous proposing to Kim Kardashian?

Kris Humphries certainly got butterflies before he asked the reality star to marry him! In the Keeping Up with the Kardashians clip above, the NBA star, 26, nervously mulls around his now-wife's bedroom as he prepares to ask the 30-year-old brunette beauty for her hand in marriage.

"This is the biggest moment of my life, and it's very nerve-wracking," he says. "I just want [my proposal] to be in her home, quiet and perfect."

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The New Jersey Nets forward sets the mood: he spells out "Will you marry me?" in rose petals and lights candles all throughout the room. He then gets down on one knee, clutches Kardashian's massive engagement ring in his hand and waits for his future bride to discover his surprise.

Watch Kris' romantic proposal setup in the clip above, and tune in to Keeping Up with the Kardashians Sunday night at 10 p.m. EST on E!