Game Mechanics: fish while running (at least in TD, not sure about elsewhere)

[Beldan4]

running while leveating over water in TD. hit fishing skill. says I cast in my line, then because I'm running it says I gather my stuff and go on my way....my supprise 1 finish interval later, I get a fishing skill up and I catch something...

Cast in line over water while running....when the finish interval is ended I'm over land, it asks if I'm trying to catch a land shark. obviously to checks here...but something gets messed up.