Hm, I might try though, though she does it off leash too.
She just seems to get totally over simulated and slightly unsure of the situation. Everything was fine, until we passed workers cutting down trees. 2 minutes later, she started acting up. Calmed her down, went on, tree creaked she started over again. Normally, she is pretty sure of herself, however in situations like that, she seems to not understand what is going on and I guess it turns a switch in her brain.
I guess getting frusterated with her, makes her even more frusterated than she was before.