Published Thursday, July 8, 2021 3:09PM EDT Last Updated Thursday, July 8, 2021 3:55PM EDT Annalise Mathers doesn't remember the fall that caused her concussion on a ski mountain four months ago, but she can recall the disorienting feelings that followed. The 28-year-old from Toronto was cut off by a pair of snowboarders while downhill skiing in March, sending her flying awkwardly over a jump and into a patch of snow. While Mathers didn't feel badly hurt when she came to, the headache she developed that night indicated something was amiss. Mathers was diagnosed with a concussion the following day, marking the beginning of a four-month recovery process full of unknowns, including how her symptoms would manifest and how long they'd last.