Jon Cryer -- I Needed 3 Months of Rehab After 2012 Triathlon Crash

What happens after Jon Cryer falls off his bike? HE GETS BACK ON ... even if that crash was super bloody and required 3 months of rehab.

After that brutal wipe out at the 2012 Nautica Malibu Triathlon, the "Two and a Half Men" star RETURNED to compete at the event this weekend ... and unlike last year, he finished without injury.

After the race, Cryer told TMZ ... it took 3 months of intense physical therapy to recover from the 2012 crash ... a crash that occurred when Cryer lost control of his bike when speeding down a hill, resulting in some serious road rash.

Bottom line -- Cryer's sort of a badass.

Congrats dude.