(October 19, 2016, 1:23 PM EDT) -- BOSTON — A mechanical engineer may testify as to the defects in a lawn mower and the causation of a man’s injuries while a doctor of bio-mechanics may testify as to the timing of the accident, a Massachusetts federal judge held Oct. 17 (Anthony Provanzano v. MTD Products Co. and Lowe’s Home Centers LLC, No. 15-11720, D. Mass.; 2016 U.S. Dist. LEXIS 143402)....