Fans of MTV’s My Super Psycho Sweet 16 (a pretty damn entertaining made-for-TV movie) get ready for more terror as Reid Ewing (“Modern Family”) has booked a lead role in the new MTV project The Truth Below. The telefilm, about a group of teens trapped in an avalanche, starts production in Canada this week. No other details have been revealed. Adam Green had a similar survival horror film in theaters this past February. In Frozen three skiers were trapped on a lift.