I didn't vote either way, but the full-on celly is traditional for clinching the postseason. However, it can get ridiculous if we let it. I can think of ten possible milestones to celebrate: clinching a postseason berth, clinching home field in the WC game, clinching a division title, clinching home field in the LDS, clinching home field in the LCS (if the team were to advance), clinching home field in the WS (if the team were to advance), winning the WC game, winning the LDS, winning the LCS and winning the WS.