Yes this is actually a legitimate ace with a one single HE grenade. And yes, it is as awesome as it sounds, take a look.
This is the reason why Banana rushes are not the greatest idea. Some well timed and placed utility can result in a team wipe within seconds. Sure the chances of this exact thing happening again are pretty slim, but you get the point.
Amazingly this isn’t the first utility based ace we have seen this week on Inferno. Stanislaw managed to hit this during the group stages of ESL One Cologne, although this is clearly an intentional suicide by naVi and the other clip was certainly not intentional.
We can but dream of the day when we manage to hit an ace with a single grenade. If you have ever managed to hit one drop the clip in the comments below.