I think it's somewhat horseplay.

When you're young you think you're invincible.

It was more horseplay than anything else, fooling around,

They're misconstruing horseplay as something improper.

While they were walking to the park, she noticed that the guys had kind of dropped back. One guy really dropped back and all of a sudden the other individual grabbed her and sexually assaulted her. The other one yells out something like 'stop assaulting her', she managed to make a threat and than they both ran off.

He's getting the increase that goes with the job.