DXM is also used recreationally. When exceeding label-specified maximum dosages, dextromethorphan acts as a dissociative anesthetic. Its mechanism of action is via multiple effects, including actions as a nonselective serotonin reuptake inhibitor and a sigma-1 receptor agonist.
Aroldis Chapman has thrown the fastest pitch ever recorded, but he has challengers for baseball's hottest heater in 2017. Ever since Aroldis Chapman delivered a 105 mph fastball to Tony Gwynn Jr., Chapman's name has been synonymous with velocity.
That's the fastest bowling there is: Scientists say baseball pitchers have reached the speed limit for throwing a ball at 105.1mph. 1  Restraints on ligaments and tendons means top speed will not increase. 2  Repetition leaves soft tissue 'frayed like candy floss'.