Scripting Problem Help Please

[Mooserider]

I thought if you set up a callback - in this case probably using AddEntityCollideCallback - in the OnStart section it could only happen once due to the callback only being made the first time you enter the map. If you've set it up in OnEnter then every time you enter the map it will re-make that callback, therefore enabling it to repeat itself. If that's not the problem though FastHunter's solution would work.