Visitors to Tacoma Rail’s open house this Saturday will have the chance to tour the Tideflats for free and also learn the answer to a mathematically challenging question: Can a 280-pound man pull a 76,000-pound train caboose 75 feet?

The open house runs from 10 a.m. to 2 p.m. on Sept. 15. Tacoma native Mark Kirsch will flex his muscles and attempt to pull a Tacoma Rail caboose at 11:30 a.m. and 1:30 p.m. The strongman has already proven he’s no wimp by pulling two 35,000-pound fire trucks on one occasion and a truck full of hot tubs on another.

The Tacoma Rail open house is part of Maritime Fest and gives Tacomans and others the unique opportunity to ride on Tacoma Rail’s tracks, get an up-close perspective at a 3,000-horsepower diesel locomotive and look behind the scenes of one of America’s biggest short-line railroads. Because the event takes place in an industrial area, Tacoma Rail encourages visitors to wear sturdy shoes.

The open house will take place near the Tacoma Rail offices at 2601 SR-509 North Frontage Road.