Marlins Park already has a hopping nightclub beyond its left field walls in the Clevelander.
On Monday night, the area above it was a baseball-themed mosh pit.
With the Home Run Derby in full swing, fans packed the popular walkway in what used to be the east end zone of the Orange Bowl.
Security shut off access to the area an hour before the Derby started with only fans with tickets in those small sections allowed access.
Those who were already in the party zone next to the Budweiser Balcony got to stay — as long as they didn’t leave.