Just sayin', you're talking about a normal human thing, not an Rh- thing.

Fear gives us "superhuman" strength:

[link to www.scientificamerican.com]

Fight or flight response:

[link to en.wikipedia.org]

That's the problem about asking these questions in this context. You automatically assume that some commonality is due to your blood type without questioning it and then it becomes "an Rh- trait".