We need to begin with a sentence that should not need to exist.
Do not go to the bathroom on the floor.
Do not go in a corner. Do not go against a wall. Do not go in a cup, a bag, your clothing, or any other improvised location that makes venue staff reconsider every decision that led them to this shift.
If your body tells you it is time, leave the crowd and use the bathroom.
Yes, you may lose your spot.
Yes, someone else may move closer to the stage.
No, that does not make the floor an acceptable alternative.
A concert is a shared public space. The people around you did not agree to become witnesses, cleanup crew, or supporting characters in the worst story they will tell for the next decade.
The bathroom may be far away. The line may be long. The timing may be terrible.
Go anyway.
Missing part of one song is disappointing.
Becoming permanently associated with an incident near the barricade is a legacy.