If you are euphoric, you feel intense happiness and excitement.
①You'd think one extreme is gonna make you euphoric and the other suicidal.
②The atmosphere was euphoric , he turned to the stands and shouted to his audience.
③It had received euphoric support from the public.
If a situation or action is fraught with problems or risks, it is filled with them.
①The earliest operations employing this technique were fraught with dangers.
②The journey was fraught with difficulties.
比如《经济学人》一篇关于极限挑战的文章 Last of the daredevils 也出现了这个表达：
be riddled with
be infested with
be crammed with
be congested with
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