A dictionary of Confusable Phrases: More Than 10,000 Idioms and Collocations

Note: 
a) Neither expression correlates in meaning with the
phrase play out of one’s skin— give an outstanding performance:
He then played out of his skin for the remainder of the tour-
nament, made a couple of mistakes … but was still a force to
be reckoned with.
b) Neither expression correlates in meaning with the phrase
cast its skin—(of a reptile) shed its skin: About the middle of
the month [September] the common snake sloughs or casts its
skin.
jump over the fence • jump over the wall
jump over the fence —(coll.) exceed the limits of reasonable
conduct; go too far: She goes pretty near the knuckle some-
times, but she never jumps over the fence.
Note: 
The expression is not antonymous in meaning to the
phrase sit on the fence— be undecided in opinion or action: The
French delegation, which has hitherto been sitting on the
fence, has suddenly become exceedingly active.
jump over the wall —(also: go over the wall) leave a religious
order: No one knows how many religious have jumped over
join forces
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the wall — partly because it is so easy today to take a leave of
absence and never return.
jump the traces • jump the track
jump the traces —(coll.) break loose from restraint; misbe-
have (also: kick over the traces): I believe there would be enor-
mous pressure on us to jump the traces and break out from
under discipline.
jump the track —
1
. (of railroad carriages) go off the rails: Just
as the train crossed a 40-foot high trestle, it jumped the track.
The engine reached the other side, but the next eight cars
crashed over the trestle. 2. (coll.) change from one thought or
idea to another without plan or reason: Any device that will
clarify logical relationships between ideas is important because
argument is prone to “jump the track” and take up unrelated
issues.