In the 737 for example, part of the sequence required of actions if going sideways on a slippery runway is to select idle reverse. Much depends on how you select idle reverse. if you inadvertently slam the reverse levers fully down in the haste to get idle reverse, chances are you may go past the idle reverse detent especially if it is worn or ill-defined.
It is quite possible to then finish up with forward thrust because of the time it takes to run the RPM down towards idle. You will easily find yourself with N1 winding down past 45- 55% in forward thrust. This will accelerate the aircraft down the runway when you need to be slowing up.