Johnny Galecki spent 12 seasons cracking up his castmates on "The Big Bang Theory" with forgotten lines, missed cues, and his go-to expression of frustration. #JohnnyGalecki #TheBigBangTheory #BehindTheScenes Season 1: So many balls | 0:00 Season 2: Karma and preparation | 1:10 Season 3: Missed shots, missed cues | 2:24 Season 4: Fresh feet, fresh gags | 3:22 Season 5: Bongos and mayhem | 3:57 Season 6: Shush, audience | 4:32 Season 7: To the tar pits | 5:27 Seasons 8 and 9: A fluid situation | 6:07 Season 10: The season of flubs | 6:45 Season 11: Breaking the tension | 7:18 Season 12: Full circle | 8:12 Snacking on Failure | 8:47 Visit Official Looper Website https://www.looper.com Read Full Article: https://www.looper.com/1857836/times-johnny-galecki-broke-characters-on-set/