Reborn - Episode 53 "A Taste of Anxiety"

Everyone in Tsuna's family is worried about the outcome of the Cloud battle.

If it's Hibari that's fighting, then they should have a one-hit K.O. no-worry win.

However, when it seems that the daunting Gola Mosca is more than he appears to be, even Tsuna, who's still training to complete his Zero-Point, gets very worried.