Why do you automatically assume E drops instead of P

increases? lol

Trailing PE is low, because its P decreased from 540 to 200. Forwarding PE is high, because either Wall Street has to slash E commensurately (which will give DUOL a fantastic opportunity to shine LOL), or as the analysts' consensus, P is going to be 330+ in the next 12 months, which is a 60%+ increase!