Trombone? That's nothing, disguise a couple of miniguns in guitar cases, and a rocket launcher in a Cello case. THAT'S sure to cause some chaos when the "band" rolls in.
Also, the movie that that's from is one of my favorite Antonio Banderez movies, El Mariachi.
*pulls out a suitcase, presses a few buttons, and suddenly a Tank sized mecha appears out of nowhere from the case, I pick up the case, jump inside the mecha, and place the case in the console, opens the case, and the suit's bio-sensors and neural interface bind to my nerves and neurological system while closing the ****pit hatch. The mech rises to its feet, the shoulder-pods open revealing numerous weapons including an oversized AA-12 Shotgun, M-79 and MGL-140 Grenade Launchers, Heavy Machine guns, missile pods, sniper rifles, assault rifles, and several bladed and energy-based melee weapons on racks that sprout from the shoulder pods when opened.*
Hmmm, well, this paint job is kind of off...
*The external pigment controllers change the pigment from red and black to orange, white, and black, then auto-correction accelerators sprout a tail, change the legs to digitigrade legs, and add in micro-accelerators for four-legged transport with additional mounts and arms for weapons on the back, along with jump-jets and boosters*
There we go, now let's rock!
*Dashes around using the blade-rollers on the feet and arms for more maneuverability and speed with the thrusters, ripping various other mechs and infantry to pieces with the Eviscerator chainswords and Shredder Shotguns*
Woohoo! Yeah baby, I new the new model Alpha Fox R-37 Combat Mech would be a good buy! And it came with a decades worth of free maintenance and upgrades from the manufacturer!