[GAMEPLAY] Rek'Sai denies stuns with tunnels
If Rek'Sai begins tunneling and is stunned during the travel time, the stun will apply immediately but he will continue moving. From what I understand, abilities like Rek'Sai's tunnel are supposed to defer crowd control until the animation is complete. Here the duration of the stun is not deferred, only ignored. With well timed tunnels, Rek'Sai can completely negate certain short instances of crowd control, or greatly reduce their impact.
This has happened repeatedly in my games, and in the above example from Worlds. It seems to be 100% reproducible.